/*
  SortTable
  version 2
  7th April 2007
  Stuart Langridge, http://www.kryogenix.org/code/browser/sorttable/

  Modified Mars-September 2008
  Niklas Martinsson
  + More classes, events and features

  Instructions:
  Download this file
  Add <script src="sorttable.js"></script> to your HTML
  Add class="sortable" to any table you'd like to make sortable
  Click on the headers to sort
  
  Thanks to many, many people for contributions and suggestions.
  Licenced as X11: http://www.kryogenix.org/code/browser/licence.html
  This basically means: do what you want with it.
*/
/*
Table class types:
  sortable                   - Makes the table sortable
  sortable_noguessing        - All guesses are alpha
  sortable_nodateguessing    - No not try to guess dates
  sortable_casesensitive     - Skip toLowerCase before sort
  sortable_locale            - Use localeCompare
  sortable_multilevelsorting - Multi level sorting
  sortable_captionfilter     - Adds filter input control in table caption
  sortable_stripes_...       - Stripe table colors, example: sortable_stripes_white_XF8F8F8 (white and #F8F8F8)
  sortable_group             - Grouping (popup menu)
  sortable_deletablecolumns  - Removeable columns (sorttablePopup.js)
Table column header class types:
  sorttable_nosort           - Do not sort column
  sorttable_([a-z0-9]+)      - Sort with sorttable.sort_([a-z0-9]+)
Events:
  onBeforeInit(table)
  onAfterInit(table)
  onGuessType(table, column)
  onAllowSort(table, column, thcell)
  onBeforeSort(table, column, thcell)
  onAfterSort(table, column, thcell)
  onBeforeFilter(table)
  onAfterFilter(table)
  onStripeTable(table)
  onTableChanged(table)              - called after onAfterSort/onAfterFilter
  // Events for overriding table class types
  onIsSortable(table)                - sortable
  onDoGuess(table, column)           - !sortable_noguessing
  onDoGuessDates(table, column)      - !sortable_nodateguessing
  onIsCaseSensitive(table, column)   - sortable_casesensitive
  onUseLocale(table, column)         - sortable_locale
  onUseMultiLevel(table, column)     - sortable_multilevelsorting
  onDoAddFilter(table)               - sortable_captionfilter, sortable_captionfilter_nocap=2
  onGetStripeColors(table)           - sortable_stripes_..., ignored if onStripeTable is set
  onAllowGroup(table, column, thcell)- sortable_group
  onAllowColumnDelete(table,column,thcell) - sortable_deletablecolumns
Properties:
  filterCaption                     - 'Filter: '
*/

 
var stIsIE = /*@cc_on!@*/false;

sorttable = {
  filterCaption: 'Filter: ',
  onIsSortable: function(table) {return /\bsortable\b/.test(table.className);},
  onDoGuess: function(table,column) {return !/\bsortable_noguessing\b/.test(table.className);},
  onDoGuessDates: function(table,column) {return !/\bsortable_nodateguessing\b/.test(table.className);},
  onIsCaseSensitive: function(table,column) {return /\bsortable_casesensitive\b/.test(table.className);},
  onUseLocale: function(table,column) {return /\bsortable_locale\b/.test(table.className);},
  onUseMultiLevel: function(table,column) {return /\bsortable_multilevelsorting\b/.test(table.className);},
  onDoAddFilter: function(table) {if (/\bsortable_captionfilter_nocap\b/.test(table.className)) {return 2;} else return /\bsortable_captionfilter\b/.test(table.className);},
  onAllowGroup: function(table, column, thcell) {return /\bsortable_group\b/.test(table.className);},
  onAllowColumnDelete: function(table,column,thcell) {return /\bsortable_deletablecolumns\b/.test(table.className);},

  init: function() {
    // quit if this function has already been called
    if (arguments.callee.done) {return;}
    // flag this function so we don't do the same thing twice
    arguments.callee.done = true;
    // kill the timer
    if (_timer) {clearInterval(_timer);}
    
    if (!document.createElement || !document.getElementsByTagName) {return;}
    
    sorttable.DATE_RE = /^(\d\d?)[\/\.-](\d\d?)[\/\.-]((\d\d)?\d\d)$/;
    
    var tables = document.getElementsByTagName('table');
    for (var i=0; i<tables.length; i++) {
      var table = tables[i];
      if (sorttable.onIsSortable(table)) {
        sorttable.beforeInit(table);
        if (!table.id) {table.id = 'sortable_id_' + i;}
        var doAdd = sorttable.onDoAddFilter(table);
        if (doAdd) {
          if (!table.caption) {
            table.createCaption();
          }
          if (doAdd != 2) {
            table.caption.innerHTML += sorttable.filterCaption;
          }
          //table.caption.innerHTML += '<input id="' + table.id + '_filter" onkeyup="tablefilter(this, ' + "'" + table.id + "'" + ')" type="text">';
          table.caption.innerHTML += '<input id="'+table.id+'_filter" onkeyup="nv=this.value.replace(/^\\s+|\\s+$/g,'+"''"+');if(this.oldval!=nv){this.oldval=nv;if(this.oldtimer){clearTimeout(this.oldtimer);}this.oldtimer=setTimeout(function(){tablefilter(document.getElementById('+"'"+table.id+"_filter'),'"+table.id+"'"+')},450)}" type="text">';
        }
        sorttable.makeSortable(table);
        sorttable.afterInit(table);
        sorttable.stripeTable(table);
      }
    }
  },
  
  makeSortable: function(table) {
    if (table.getElementsByTagName('thead').length === 0) {
      // table doesn't have a tHead. Since it should have, create one and
      // put the first table row in it.
      var the = document.createElement('thead');
      the.appendChild(table.rows[0]);
      table.insertBefore(the,table.firstChild);
    }
    // Safari doesn't support table.tHead, sigh
    if (table.tHead === null) {table.tHead = table.getElementsByTagName('thead')[0];}
    
    if (table.tHead.rows.length !== 1) {return;} // can't cope with two header rows
    
    // Sorttable v1 put rows with a class of "sortbottom" at the bottom (as
    // "total" rows, for example). This is B&R, since what you're supposed
    // to do is put them in a tfoot. So, if there are sortbottom rows,
    // for backwards compatibility, move them to tfoot (creating it if needed).
    var sortbottomrows = [];
    for (var i=0; i<table.rows.length; i++) {
      if (table.rows[i].className.search(/\bsortbottom\b/) !== -1) {
        sortbottomrows[sortbottomrows.length] = table.rows[i];
      }
    }
    if (sortbottomrows) {
      if (table.tFoot === null) {
        // table doesn't have a tfoot. Create one.
        var tfo = document.createElement('tfoot');
        table.appendChild(tfo);
      }
      for (var i=0; i<sortbottomrows.length; i++) {
        tfo.appendChild(sortbottomrows[i]);
      }
      delete sortbottomrows;
    }
    
    // work through each column and set click event
    var headrow = table.tHead.rows[0].cells;
    for (var i=0; i<headrow.length; i++) {
      // manually override the type with a sorttable_type attribute
      if (!headrow[i].className.match(/\bsorttable_nosort\b/)) { // skip this col
        // make it clickable to sort
        headrow[i].sorttable_table = table;
        headrow[i].sorttable_columnindex = i;
        headrow[i].sorttable_tbody = table.tBodies[0];
        dean_addEvent(headrow[i], "click", sorttable.columnHeaderClick);
        dean_addEvent(headrow[i], "mouseover", function(e) { this.style.cursor='pointer';});
        if (sorttable.columnHeaderContextMenu)
          dean_addEvent(headrow[i], "contextmenu", sorttable.columnHeaderContextMenu);
      }
    }
    table.deletedColumns = 0;
    table.sortable_grouped = 0;
  },

  columnMoved: function(table) {
    var headrow = table.tHead.rows[0].cells;
    for (var i=0; i<headrow.length; i++)
      headrow[i].sorttable_columnindex = i;
  },

  allowColumnDelete: function(cell) {
    return sorttable.onAllowColumnDelete(cell.sorttable_table, cell.sorttable_columnindex, cell);
  },

  deleteColumn: function(table, columnIndex) {
    var headrow = table.tHead.rows[0].cells;
    if (!sorttable.allowColumnDelete(headrow[columnIndex])) {return;}
    removeEvent(headrow[columnIndex], "click", sorttable.columnHeaderClick);
    headrow[columnIndex].onmousedown = function(e) {};
    var row;
    var i=table.rows.length;
    while (i--){
      row = table.rows[i];
      if (row.sorttableGroupRow!=1)
        row.removeChild(row.cells[columnIndex]);
    }
    table.deletedColumns++;
    sorttable.columnMoved(table);
  },

  setOrgRowNo: function(table) {
    for (var i=0; i<table.tBodies[0].rows.length; i++) {
      table.tBodies[0].rows[i].sorttable_OrgRowNo = i;
    }
  },

  addGroupRow: function(table, tbody, index, text)
  {
    var newRow = tbody.insertRow(index);
    newRow.sorttable_tbody = tbody;
    newRow.sorttable_table = table;
    newRow.sorttableGroupRow = 1;
    var newCell = newRow.insertCell(0);
    var newText = document.createTextNode(text);
    newCell.appendChild(newText);
    newCell.colSpan = 100;
    newCell.className = "sortable_grouprow";
    if (sorttable.onAddGroupRow)
      sorttable.onAddGroupRow(table, newRow, text);
    return newRow;
  },

  removeGroupBy: function(hCell)
  {
    var rows = hCell.sorttable_tbody.rows;
    var table = hCell.sorttable_table;
    if (table.sortable_grouped)
      for (var j=rows.length-1;j>=0; j--)
        if (rows[j].sorttableGroupRow==1)
          hCell.sorttable_tbody.deleteRow(j);
    table.sortable_grouped = 0;
  },

  groupBy: function(hCell)
  {
    if (!sorttable.allowGroup(hCell)){return;}
    // Remove headers
    sorttable.removeGroupBy(hCell);
    // Sort
    sorttable.columnHeaderSort(hCell, "asc", true);
    sorttable.removeSortedClasses(hCell);
    // Add headers
    var table = hCell.sorttable_table;
    var tbody = hCell.sorttable_tbody;
    var col = hCell.sorttable_columnindex;
    var rows = hCell.sorttable_tbody.rows;
    var getText = sorttable.doGetInnerText(hCell);
    var colcount = hCell.parentNode.childNodes;
    var headertext = sorttable.getInnerText(hCell) + ': ';

    var group = 0;
    if (rows.length > 1)
    {
      var current = getText(rows[rows.length-1].cells[col]);
      var currentText = sorttable.getInnerText(rows[rows.length-1].cells[col]);
      for (var j=rows.length-1;j>=0; j--)
      {
        rows[j].sorttableGroupNo = group;
        var next = getText(rows[j].cells[col]);
        if (next!=current)
        {
          rows[j].sorttableGroupNo = group-2;
          sorttable.addGroupRow(table, tbody, j+1, headertext + currentText).sorttableGroupNo = group-1;
          group = group - 2;
          current = next;
          currentText = sorttable.getInnerText(rows[j].cells[col]);
        }
      }
      sorttable.addGroupRow(table, tbody, 0, headertext + currentText).sorttableGroupNo = group-1;
    }
    table.sortable_grouped = 1;
  },

  removeSortedClasses: function(hCell)
  {
    var theadrow = hCell.parentNode;
    forEach(theadrow.childNodes, function(cell) {
      if (cell.nodeType == 1) { // an element
        cell.className = cell.className.replace('sorttable_sorted_reverse','');
        cell.className = cell.className.replace('sorttable_sorted','');
      }
    });
    var sortfwdind = document.getElementById(hCell.sorttable_table.id + '_sorttable_sorted_reverse');
    if (sortfwdind) {sortfwdind.parentNode.removeChild(sortfwdind);}
    var sortrevind = document.getElementById(hCell.sorttable_table.id + '_sorttable_sorted');
    if (sortrevind) {sortrevind.parentNode.removeChild(sortrevind);}
  },

  doGetInnerText: function(hCell) {
    if (!hCell.sorttable_getInnerText)
      hCell.sorttable_getInnerText = sorttable.onIsCaseSensitive(hCell.sorttable_table, hCell.sorttable_columnindex) ?
        sorttable.getInnerText : sorttable.getInnerTextLowerCase;
    return hCell.sorttable_getInnerText;
  },

  columnHeaderClick: function(e) {
    sorttable.columnHeaderSort(this, "toggle", false);
  },

  columnHeaderSort: function(hCell, sorttype, forced) {
    if (!sorttable.beforeSort(hCell, forced)) {return;}
    var table = hCell.sorttable_table;
    if (!hCell.sorttable_sortfunction) {
      if (!table.sorttable_OrgRowNoSet) {
        sorttable.setOrgRowNo(table);
        table.sorttable_OrgRowNoSet = 1;
      }
      hCell.sorttable_MultiLevelSorting = sorttable.onUseMultiLevel(table, hCell.sorttable_columnindex);
      // Guess type
      var mtch = hCell.className.match(/\bsorttable_([a-z0-9]+)\b/);
      if (mtch) {var override = mtch[1];}
      if (mtch && typeof sorttable["sort_"+override] == 'function') {
        hCell.sorttable_sortfunction = sorttable["sort_"+override];
      } else {
        hCell.sorttable_sortfunction = sorttable.guessType(
          table, hCell.sorttable_columnindex);
      }
    }
    var currentAsc = hCell.className.search(/\bsorttable_sorted\b/) !== -1;
    var currentDesc = hCell.className.search(/\bsorttable_sorted_reverse\b/) !== -1;
    if (currentAsc && (sorttype == "asc") || currentDesc && (sorttype == "desc") || !currentAsc && !currentDesc && (sorttype=="none"))
      return; // already correct sorting
    if (currentAsc && ((sorttype=="toggle")||(sorttype=="desc"))) {
      // if we're already sorted by this(hCell) column, just
      // reverse the table, which is quicker
      sorttable.reverse(hCell, 0, 'sorttable_sorted', 'sorttable_sorted_reverse');
      return;
    }
    if (currentDesc && (sorttype=="asc")) {
      sorttable.reverse(hCell, 0, 'sorttable_sorted_reverse', 'sorttable_sorted');
      return;
    }
    if (sorttype=="none") {
      sorttable.reverse(hCell, 1, currentDesc?'sorttable_sorted_reverse':'sorttable_sorted', '');
      return;
    }
    if (currentDesc) {
      if (hCell.sorttable_MultiLevelSorting) {
        // if we're already sorted by this(hCell) column in reverse, just
        // re-reverse the table, which is quicker
        sorttable.reverse(hCell, 0, 'sorttable_sorted_reverse', 'sorttable_sorted');
      } else {
        // if not multi level sorting, revert to original order
        sorttable.reverse(hCell, 1, 'sorttable_sorted_reverse', '');
      }
      return;
    }
    // remove sorttable_sorted classes
    sorttable.removeSortedClasses(hCell);
    hCell.className += ' sorttable_sorted';
    sorttable.addarrow(hCell, 'sorttable_sorted');

    // build an array to sort. This is a Schwartzian transform thing,
    // i.e., we "decorate" each row with the actual sort key,
    // sort based on the sort keys, and then put the rows back in order
    // which is a lot faster because you only do getInnerText once per row
    var row_array = [];
    var col = hCell.sorttable_columnindex;
    var rows = hCell.sorttable_tbody.rows;
    var getText = sorttable.doGetInnerText(hCell);
    if (table.sortable_grouped) {
      for (var j=rows.length-1; j>=0; j--) {
        r = rows[j];
        row_array[j] = (r.sorttableGroupRow==1) ? ['', r, j] : [getText(r.cells[col]), r, r.sorttable_OrgRowNo];
      }
      var cellSort = hCell.sorttable_sortfunction;
      var sortfunction = function(a, b) {
        var r = a[1].sorttableGroupNo - b[1].sorttableGroupNo;
        if (r==0)
          r = cellSort(a, b);
        return r;};
    } else {
      for (var j=rows.length-1; j>=0; j--)
        row_array[j] = [getText(rows[j].cells[col]), rows[j], rows[j].sorttable_OrgRowNo];
      var sortfunction = hCell.sorttable_sortfunction;
    }
    if (hCell.sorttable_MultiLevelSorting)
      for (var j=rows.length-1; j>=0; j--)
        row_array[j][2] = j;
    if (sorttype=="desc")
      for (var j=rows.length-1; j>=0; j--)
        row_array[j][2] = -row_array[j][2];
    row_array.sort(sortfunction);
    var tb = hCell.sorttable_tbody;
    for (var j=0; j<row_array.length; j++) {
      tb.appendChild(row_array[j][1]);
    }
    delete row_array;
    if (sorttype=="desc")
      sorttable.reverse(hCell, 0, 'sorttable_sorted', 'sorttable_sorted_reverse');
    sorttable.afterSort(hCell);
  },

  guessType: function(table, column) {
    // guess the type of a column based on its first non-blank row
    if (sorttable.onGuessType) {
      var f = sorttable.onGuessType(table, column);
      if (f) {return f;}
    }
    var sortfn = sorttable.onUseLocale(table,column) ? sorttable.sort_alpha_locale : sorttable.sort_alpha;
    if (sorttable.onDoGuess(table, column)) {
      for (var i=0; i<table.tBodies[0].rows.length; i++) {
        if (table.tBodies[0].rows[i].sorttableGroupRow!=1) {
          var text = sorttable.getInnerText(table.tBodies[0].rows[i].cells[column]);
          if (text != '') {
            if (text.match(/^-?[£$¤]?[\d,.]+%?$/)) {
              return sorttable.sort_numeric;
            }
            // check for a date: dd/mm/yyyy or dd/mm/yy
            // can have / or . or - as separator
            // can be mm/dd as well
            var possdate = text.match(sorttable.DATE_RE) && sorttable.onDoGuessDates(table,colum);
            if (possdate) {
              // looks like a date
              var first = parseInt(possdate[1]);
              var second = parseInt(possdate[2]);
              if (first > 12) {
                // definitely dd/mm
                return sorttable.sort_ddmm;
              } else if (second > 12) {
                return sorttable.sort_mmdd;
              } else {
                // looks like a date, but we can't tell which, so assume
                // that it's dd/mm (English imperialism!) and keep looking
                sortfn = sorttable.sort_ddmm;
              }
            }
          }
        }
      }
    }
    return sortfn;
  },
  
  getInnerTextLowerCase: function(node) {
    return sorttable.getInnerText(node).toLowerCase();
  },

  getInnerText: function(node) {
    // gets the text we want to use for sorting for a cell.
    // strips leading and trailing whitespace.
    // this is *not* a generic getInnerText function; it's special to sorttable.
    // for example, you can override the cell text with a customkey attribute.
    // it also gets .value for <input> fields.
    
    var hasInputs = (typeof node.getElementsByTagName == 'function') &&
                 node.getElementsByTagName('input').length;
    
    if (node.getAttribute("sorttable_customkey") !== null) {
      return node.getAttribute("sorttable_customkey");
    }
    else if (typeof node.textContent != 'undefined' && !hasInputs) {
      return node.textContent.replace(/^\s+|\s+$/g, '');
    }
    else if (typeof node.innerText != 'undefined' && !hasInputs) {
      return node.innerText.replace(/^\s+|\s+$/g, '');
    }
    else if (typeof node.text != 'undefined' && !hasInputs) {
      return node.text.replace(/^\s+|\s+$/g, '');
    }
    else {
      switch (node.nodeType) {
        case 3:
          if (node.nodeName.toLowerCase() == 'input') {
            return node.value.replace(/^\s+|\s+$/g, '');
          }
        case 4:
          return node.nodeValue.replace(/^\s+|\s+$/g, '');
        case 1:
        case 11:
          var innerText = '';
          for (var i = 0; i < node.childNodes.length; i++) {
            innerText += sorttable.getInnerText(node.childNodes[i]);
          }
          return innerText.replace(/^\s+|\s+$/g, '');
        default:
          return '';
      }
    }
  },
  
  addarrow: function(cell, className)
  {
    var span = document.createElement('span');
    span.id = cell.sorttable_table.id + '_' + className;
    if (className === 'sorttable_sorted_reverse') {
      span.innerHTML = stIsIE ? '&nbsp<font face="webdings">6</font>' : '&nbsp;&#x25BE;';
    } else {
      span.innerHTML = stIsIE ? '&nbsp<font face="webdings">5</font>' : '&nbsp;&#x25B4;';
    }
    cell.appendChild(span);
  },

  reverse: function(cell, sortoriginal, oldClass, newClass)
  {
    var table = cell.sorttable_table;
    var tbody = cell.sorttable_tbody;
    cell.className = cell.className.replace(oldClass, newClass);
    cell.removeChild(document.getElementById(cell.sorttable_table.id + '_' + oldClass));
    if (newClass !== '')
      sorttable.addarrow(cell, newClass);
    // reverse the rows in a tbody
    var rows = tbody.rows;
    var r = null;
    var newrows = [];
    var lastrow = tbody.rows.length-1;
    if (table.sortable_grouped)
    {
      var top = 0;
      var bottom = lastrow;
      for  (var i = 1; i <= lastrow+1; i++)
      {
        if ((i == lastrow+1) || (rows[i].sorttableGroupRow==1)) {
          newrows[bottom] = rows[top];
          bottom--;
          for (var j = i-1; j > top; j--) {
            newrows[bottom] = rows[j];
            bottom--;
          }
          top = i;
        }
      }
      if (sortoriginal)
        newrows.sort(function(a,b) {
          var r = b.sorttableGroupNo - a.sorttableGroupNo;
          if (r==0)
            r = b.sorttable_OrgRowNo - a.sorttable_OrgRowNo;
          return r;
        });
    }
    else
    {
      for (var i=lastrow; i >= 0; i--) {
        newrows[i] = rows[i];
        //tbody.rows[i].remove;
      }
      if (sortoriginal)
        newrows.sort(function(a,b) {return b.sorttable_OrgRowNo - a.sorttable_OrgRowNo;});
    }
    for (var i=newrows.length-1; i>=0; i--)
       tbody.appendChild(newrows[i]);
    delete newrows;
    sorttable.afterSort(cell);
  },

  beforeInit: function(table)
  {
    if (sorttable.onBeforeInit)
      sorttable.onBeforeInit(table);
  },

  afterInit: function(table)
  {
    if (sorttable.onAfterInit)
      sorttable.onAfterInit(table);
  },

  allowSort: function(cell)
  {
    return sorttable.onAllowSort ? sorttable.onAllowSort(cell.sorttable_table, cell.sorttable_columnindex, cell) : 1;
  },

  allowGroup: function(cell)
  {
    return sorttable.onAllowGroup(cell.sorttable_table, cell.sorttable_columnindex, cell);
  },

  beforeSort: function(cell, forced)
  {
    var r = sorttable.allowSort(cell) || forced;
    if (!r) {cell.style.cursor='pointer';}
    if (r && sorttable.onBeforeSort) {sorttable.onBeforeSort(cell.sorttable_table, cell.sorttable_columnindex, cell);}
    return r;
  },

  afterSort: function(cell)
  {
    cell.style.cursor='pointer';
    if (sorttable.onAfterSort)
      sorttable.onAfterSort(cell.sorttable_table, cell.sorttable_columnindex, cell);
    sorttable.tableChanged(cell.sorttable_table);
  },

  beforeFilter: function(table)
  {
    if (sorttable.onBeforeFilter)
      sorttable.onBeforeFilter(table);
  },

  afterFilter: function(table)
  {
    if (sorttable.onAfterFilter)
      sorttable.onAfterFilter(table);
    sorttable.tableChanged(table);
  },

  onGetStripeColors: function(table)
  {
    var classnames = table.className.split(' ');
    for (var cn=0; cn < classnames.length; cn++) {
      if (classnames[cn].match(/\bsortable_stripes_([_A-Za-z0-9]+)\b/)) {
        var colors = classnames[cn].substr(17).split('_');
        for (var i=0; i < colors.length; i++)
          if (colors[i].charAt(0) == 'X')
            colors[i] = '#' + colors[i].substr(1);
        return colors;
      }
    }
    return [];
  },

  stripeTable: function(table)
  {
    if (sorttable.onStripeTable) {
      sorttable.onStripeTable(table);
    } else {
      var colors = sorttable.onGetStripeColors(table);
      var j = 0;
      if (colors.length > 0)
        for (var i=0; i<table.tBodies[0].rows.length; i++)
          if (table.tBodies[0].rows[i].style.display != 'none') {
            table.tBodies[0].rows[i].style.backgroundColor = colors[j%colors.length];
            j++;
          }
    }
  },

  tableChanged: function(table)
  {
    sorttable.stripeTable(table);
    if (sorttable.onTableChanged)
      sorttable.onTableChanged(table);
  },

  /* sort functions
     each sort function takes two parameters, a and b
     you are comparing a[0] and b[0] */

  sort_by_orgrowno: function(a,b) {
    return a[2]-b[2];
  },

  sort_numeric: function(a,b) {
    aa = parseFloat(a[0].replace(/[^0-9.-]/g,''));
    if (isNaN(aa)) {aa = 0;}
    bb = parseFloat(b[0].replace(/[^0-9.-]/g,'')); 
    if (isNaN(bb)) {bb = 0;}
    return aa==bb ? a[2]-b[2] : aa-bb;
  },
  sort_alpha: function(a,b) {
    return a[0]==b[0] ? a[2]-b[2] : (a[0]<b[0] ? -1:1);
  },
  sort_alpha_locale: function(a,b) {
    r = a[0].localeCompare(b[0]);
    return r===0 ? a[2]-b[2] : r;
  },
  sort_ddmm: function(a,b) {
    mtch = a[0].match(sorttable.DATE_RE);
    y = mtch[3]; m = mtch[2]; d = mtch[1];
    if (m.length == 1) {m = '0'+m;}
    if (d.length == 1) {d = '0'+d;}
    dt1 = y+m+d;
    mtch = b[0].match(sorttable.DATE_RE);
    y = mtch[3]; m = mtch[2]; d = mtch[1];
    if (m.length == 1) {m = '0'+m;}
    if (d.length == 1) {d = '0'+d;}
    dt2 = y+m+d;
    return dt1==dt2 ? a[2]-b[2] : (dt1<dt2 ? -1:1);
  },
  sort_mmdd: function(a,b) {
    mtch = a[0].match(sorttable.DATE_RE);
    y = mtch[3]; d = mtch[2]; m = mtch[1];
    if (m.length == 1) {m = '0'+m;}
    if (d.length == 1) {d = '0'+d;}
    dt1 = y+m+d;
    mtch = b[0].match(sorttable.DATE_RE);
    y = mtch[3]; d = mtch[2]; m = mtch[1];
    if (m.length == 1) {m = '0'+m;}
    if (d.length == 1) {d = '0'+d;}
    dt2 = y+m+d;
    return dt1==dt2 ? a[2]-b[2] : (dt1<dt2 ? -1:1);
  }
}

/* ******************************************************************
   Supporting functions: bundled here to avoid depending on a library
   ****************************************************************** */

// Dean Edwards/Matthias Miller/John Resig

/* for Mozilla/Opera9 */
if (document.addEventListener) {
    document.addEventListener("DOMContentLoaded", sorttable.init, false);
}

/* for Internet Explorer */
/*@cc_on @*/
/*@if (@_win32)
    document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
    var script = document.getElementById("__ie_onload");
    script.onreadystatechange = function() {
        if (this.readyState == "complete") {
            sorttable.init(); // call the onload handler
        }
    };
/*@end @*/

/* for Safari */
if (/WebKit/i.test(navigator.userAgent)) { // sniff
    var _timer = setInterval(function() {
        if (/loaded|complete/.test(document.readyState)) {
            sorttable.init(); // call the onload handler
        }
    }, 10);
}

/* for other browsers */
window.onload = sorttable.init;

// written by Dean Edwards, 2005
// with input from Tino Zijdel, Matthias Miller, Diego Perini

// http://dean.edwards.name/weblog/2005/10/add-event/

function dean_addEvent(element, type, handler) {
  if (element.addEventListener) {
    element.addEventListener(type, handler, false);
  } else {
    // assign each event handler a unique ID
    if (!handler.$$guid) handler.$$guid = dean_addEvent.guid++;
    // create a hash table of event types for the element
    if (!element.events) element.events = {};
    // create a hash table of event handlers for each element/event pair
    var handlers = element.events[type];
    if (!handlers) {
      handlers = element.events[type] = {};
      // store the existing event handler (if there is one)
      if (element["on" + type]) {
        handlers[0] = element["on" + type];
      }
    }
    // store the event handler in the hash table
    handlers[handler.$$guid] = handler;
    // assign a global event handler to do all the work
    element["on" + type] = handleEvent;
  }
};
// a counter used to create unique IDs
dean_addEvent.guid = 1;

function removeEvent(element, type, handler) {
  if (element.removeEventListener) {
    element.removeEventListener(type, handler, false);
  } else {
    // delete the event handler from the hash table
    if (element.events && element.events[type]) {
      delete element.events[type][handler.$$guid];
    }
  }
};

function handleEvent(event) {
  var returnValue = true;
  // grab the event object (IE uses a global event object)
  event = event || fixEvent(((this.ownerDocument || this.document || this).parentWindow || window).event);
  // get a reference to the hash table of event handlers
  var handlers = this.events[event.type];
  // execute each event handler
  for (var i in handlers) {
    this.$$handleEvent = handlers[i];
    if (this.$$handleEvent(event) === false) {
      returnValue = false;
    }
  }
  return returnValue;
};

function fixEvent(event) {
  // add W3C standard event methods
  event.preventDefault = fixEvent.preventDefault;
  event.stopPropagation = fixEvent.stopPropagation;
  return event;
};
fixEvent.preventDefault = function() {
  this.returnValue = false;
};
fixEvent.stopPropagation = function() {
  this.cancelBubble = true;
}

// Dean's forEach: http://dean.edwards.name/base/forEach.js
/*
  forEach, version 1.0
  Copyright 2006, Dean Edwards
  License: http://www.opensource.org/licenses/mit-license.php
*/

// array-like enumeration
if (!Array.forEach) { // mozilla already supports this
  Array.forEach = function(array, block, context) {
    for (var i = 0; i < array.length; i++) {
      block.call(context, array[i], i, array);
    }
  };
}

// generic enumeration
Function.prototype.forEach = function(object, block, context) {
  for (var key in object) {
    if (typeof this.prototype[key] == "undefined") {
      block.call(context, object[key], key, object);
    }
  }
};

// character enumeration
String.forEach = function(string, block, context) {
  Array.forEach(string.split(""), function(chr, index) {
    block.call(context, chr, index, string);
  });
};

// globally resolve forEach enumeration
var forEach = function(object, block, context) {
  if (object) {
    var resolve = Object; // default
    if (object instanceof Function) {
      // functions have a "length" property
      resolve = Function;
    } else if (object.forEach instanceof Function) {
      // the object implements a custom forEach method so use that
      object.forEach(block, context);
      return;
    } else if (typeof object == "string") {
      // the object is a string
      resolve = String;
    } else if (typeof object.length == "number") {
      // the object is array-like
      resolve = Array;
    }
    resolve.forEach(object, block, context);
  }
};

function addCSS(cssName, cssText) {
  if (!document.styleSheets || (cssText == "")) return;
  if (document.styleSheets[0].insertRule)
    document.styleSheets[0].insertRule(cssName + '{'+cssText+'}', document.styleSheets[0].cssRules.length);
  else
    if (document.styleSheets[0].addRule)
      document.styleSheets[0].addRule(cssName, cssText, document.styleSheets[0].rules.length);
}

function changeCSS(cssName, newCssText) {
  if (!document.styleSheets) return;
  var rules = document.styleSheets[0].cssRules?document.styleSheets[0].cssRules:document.styleSheets[0].rules;
  var lowcss = cssName.toLowerCase();
  var f=0;
  for (var i=rules.length-1;i>=0;i--) {
    rule = rules[i];
    if (rule.selectorText.toLowerCase()==lowcss) {
      rule.style.cssText=newCssText;
      f++
    }
  }
  if (f==0) addCSS(cssName, newCssText);
}

// Javascript Table filter by Boris von Loesch, http://www.vonloesch.de/node/23
function tablefilter(phrase, table_id) {
  var words = phrase.value.toLowerCase().split(" ");
  var table = document.getElementById(table_id);
  sorttable.beforeFilter(table);
  var ele;
  for (var r = 1; r < table.rows.length; r++) {
    if (table.rows[r].sorttableGroupRow!=1)
    {
      ele = table.rows[r].innerHTML.replace(/<[^>]+>/g,"");
      var displayStyle = 'none';
      for (var i = 0; i < words.length; i++) {
        if (ele.toLowerCase().indexOf(words[i])>=0) {
          displayStyle = '';
        } else {
          displayStyle = 'none';
          break;
        }
      }
      table.rows[r].style.display = displayStyle;
    }
  }
  sorttable.afterFilter(table);
}