/*
 * Modified sorting table function
 * Modifications done by Rachel Rios
 * Last upated: November 13 2006
 */
var SORT_COLUMN_INDEX;

function sortables_init()
{
   // Find all tables with class sortable and make them sortable
   if (!document.getElementsByTagName) return;
   tbls = document.getElementsByTagName("table");
   for (ti = 0; ti < tbls.length; ti++)
   {
      thisTbl = tbls[ti];
      if (((' '+thisTbl.className+' ').indexOf("sortable") != -1) && (thisTbl.id))
      {
         ts_makeSortable(thisTbl);
      }
   }
}

function ts_makeSortable(table)
{
   if (table.rows && table.rows.length > 0)
   {
      var firstRow = table.rows[0];
   }
   if (!firstRow) return;
    
   // We have a first row: assume it's the header, and make its contents clickable links
   for (var i = 0; i < firstRow.cells.length; i++)
   {
      var cell = firstRow.cells[i];
      var txt = ts_getInnerHTML(cell);
      cell.innerHTML = '<a href="#" class="sortheader" onclick="ts_resortTable(this);return false;">'+txt+'<span class="sortarrow">&nbsp;</span></a>';
   }
}

function ts_getInnerHTML(el)
{
   if (typeof el == "string") return el;
   if (typeof el == "undefined") { return el };
   if (document.all)
   {
      if (el.innerHTML) return el.innerHTML;  // Not needed but it is faster
   }
   else
   {
      if (el.innerText) return el.innerText;  // Netscape compatibility
   }
   var str = "";
   
   var cs = el.childNodes;
   var l = cs.length;
   for (var i = 0; i < l; i++)
   {
      switch (cs[i].nodeType)
      {
         case 1: //ELEMENT_NODE
            str += ts_getInnerHTML(cs[i]);
            break;
         case 3:  //TEXT_NODE
            str += cs[i].nodeValue;
            break;
      }
   }
   return str;
}

function ts_resortTable(lnk)
{
   // get the span
   var span;
   for (var ci=0; ci < lnk.childNodes.length; ci++)
   {
      if (lnk.childNodes[ci].tagName && lnk.childNodes[ci].tagName.toLowerCase() == 'span')
         span = lnk.childNodes[ci];
   }
   var spantext = ts_getInnerHTML(span);
   var td = lnk.parentNode;
   var column = td.cellIndex;
   var table = getParent(td, 'TABLE');
       
   // Work out a type for the column
   if (table.rows.length <= 1) return;

   sortfn = ts_sort_caseinsensitive;
   for (var i = 0; i < table.rows.length; i ++) {
      var itm = ts_getInnerHTML(table.rows[i].cells[column]);

      if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/)) {
         sortfn = ts_sort_date;
         break;
      }
      if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/)) {
         sortfn = ts_sort_date;
         break;
      }
      if (itm.match(/^[£$]/)) {
         sortfn = ts_sort_currency;
         break;
      }
      if (itm.match(/^[\d\.]+$/)) {
         sortfn = ts_sort_numeric;
         break;
      }
   }
   SORT_COLUMN_INDEX = column;
   var firstRow = new Array();
   var newRows = new Array();
   for (i = 0; i < table.rows[0].length; i++)
   {
      firstRow[i] = table.rows[0][i];
   }
   for (j = 1; j < table.rows.length; j++)
   {
      newRows[j - 1] = table.rows[j];
   }

   newRows.sort(sortfn);

   if (span.getAttribute("sortdir") == 'down')
   {
      newRows.reverse()
      span.setAttribute('sortdir','up');
   }
   else
   {
      span.setAttribute('sortdir','down');
   }
    
   // We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
   // don't do sortbottom rows
   for (i = 0; i < newRows.length; i++)
   {
      if (!newRows[i].className || (newRows[i].className && (newRows[i].className.indexOf('sortbottom') == -1)))
         table.tBodies[0].appendChild(newRows[i]);
   }
   // do sortbottom rows only
   for (i = 0; i < newRows.length; i++)
   {
      if (newRows[i].className && (newRows[i].className.indexOf('sortbottom') != -1))
         table.tBodies[0].appendChild(newRows[i]);
   }
    
   // Delete any other arrows there may be showing
   var allspans = document.getElementsByTagName("span");
   for (var ci = 0; ci < allspans.length; ci++)
   {
      if (allspans[ci].className == 'sortarrow')
      {
         if (getParent(allspans[ci], "table") == getParent(lnk, "table")) // in the same table as us?
         {
            allspans[ci].innerHTML = '';
         }
      }
   }
        
   // Highlight the selected column
   var normalColor = "#8CC1F7";
   var hiliteColor = "#FFF994";
   for(var i = 0; i < table.rows[0].cells.length; i++)
   {
      table.rows[0].cells[i].style.backgroundColor = normalColor;
   }
   td.style.backgroundColor = hiliteColor;
}

function getParent(el, pTagName) {
   if (el == null) return null;
   else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase()) // Gecko bug, supposed to be uppercase
      return el;
   else
      return getParent(el.parentNode, pTagName);
}
function ts_sort_date(a,b) {
   // y2k notes: two digit years less than 50 are treated as 20XX, greater than 50 are treated as 19XX
   aa = ts_getInnerHTML(a.cells[SORT_COLUMN_INDEX]);
   bb = ts_getInnerHTML(b.cells[SORT_COLUMN_INDEX]);
   if (aa.length == 10) {
      dt1 = aa.substr(6,4)+aa.substr(3,2)+aa.substr(0,2);
   } else {
      yr = aa.substr(6,2);
      if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
      dt1 = yr+aa.substr(3,2)+aa.substr(0,2);
   }
   if (bb.length == 10) {
      dt2 = bb.substr(6,4)+bb.substr(3,2)+bb.substr(0,2);
   } else {
      yr = bb.substr(6,2);
      if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
      dt2 = yr+bb.substr(3,2)+bb.substr(0,2);
   }
   if (dt1==dt2) return 0;
   if (dt1<dt2) return -1;
   return 1;
}

function ts_sort_currency(a,b) { 
   aa = ts_getInnerHTML(a.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.]/g,'');
   bb = ts_getInnerHTML(b.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.]/g,'');
   return parseFloat(aa) - parseFloat(bb);
}

function ts_sort_numeric(a,b) { 
   aa = parseFloat(ts_getInnerHTML(a.cells[SORT_COLUMN_INDEX]));
   if (isNaN(aa)) aa = 0;
   bb = parseFloat(ts_getInnerHTML(b.cells[SORT_COLUMN_INDEX])); 
   if (isNaN(bb)) bb = 0;
   return aa-bb;
}
function ts_sort_caseinsensitive(a,b) {
   aa = ts_getInnerHTML(a.cells[SORT_COLUMN_INDEX]).toLowerCase();
   bb = ts_getInnerHTML(b.cells[SORT_COLUMN_INDEX]).toLowerCase();
   if (aa==bb) return 0;
   if (aa<bb) return -1;
   return 1;
}

function ts_sort_default(a,b) {
   aa = ts_getInnerHTML(a.cells[SORT_COLUMN_INDEX]);
   bb = ts_getInnerHTML(b.cells[SORT_COLUMN_INDEX]);
   if (aa==bb) return 0;
   if (aa<bb) return -1;
   return 1;
}