addEvent(window, "load", sortables_init);

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)) {
            //initTable(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_getInnerText(cell);
        cell.innerHTML = '<a href="#" class="sortheader" onclick="ts_resortTable(this);return false;">'+txt+'<span class="sortarrow">&nbsp;</span></a>';
    }
}

function ts_getInnerText(el) {
  // THIS FUNCTION IS ONLY USED FOR THE HEADER COLUMNS. -ELK
  //alert('EL:'+el+'\nTYPE:'+typeof el+'\nINNERTEXT:'+el.innerText+'\nHTML:'+el.innerHTML); // Debugging -ELK
	if (typeof el == "string") return el;
	if (typeof el == "undefined") { return el };
	//if (el.innerText) return el.innerText;	//Not needed but it is faster...AND IT BREAKS IE7! -ELK
	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_getInnerText(cs[i]);
				break;
			case 3:	//TEXT_NODE
				str += cs[i].nodeValue;
				break;
		}
	}
  // ************************************************************
  // Fix sorting of checkboxes and other HTML-only data. -ELK
  // ************************************************************
  if ( ts_trim(str) == "" ) { str = ts_getInnerHTML(el); }
  // ************************************************************
	return str;
}

function ts_getInnerHTML(el) {
  // THIS FUNCTION IS ONLY USED FOR THE HEADER COLUMNS. -ELK
  //alert('EL:'+el+'\nTYPE:'+typeof el+'\nINNERTEXT:'+el.innerText+'\nHTML:'+el.innerHTML); // Debugging -ELK
	if (typeof el == "string") return el;
	if (typeof el == "undefined") { return el };
	if (el.innerHTML) return el.innerHTML;	//Not needed but it is faster	
	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 added by Ed Kidwell 20070719. -ELK
function ts_trim(STRING){
  while( (STRING.charAt(0)==" ") || (STRING.charAt(0)=="\n") || (STRING.charAt(0)=="\r") || (STRING.charAt(0)=="\t") ) {
    STRING = STRING.replace(STRING.charAt(0),"");
  }
  while(STRING.charAt((STRING.length -1))==" "){
    STRING = STRING.substring(0,STRING.length-1);
  }
  return STRING;
}

function ts_getSortType(itm) {
    var sort_type = 'STRING';
    if ( itm != null ) { // Fix bug when table is empty. -ELK
      if (itm.match(/^[£$]/)) sort_type = 'CURRENCY';
      if (itm.match(/^[\d\.]+$/)) sort_type = 'NUMERIC';
      if (itm.match(/^[\d]/)) sort_type = 'NUMERIC';
      if (itm.match(/^[\d\.]/)) sort_type = 'NUMERIC';
      if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/)) sort_type = 'DATE';
      if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/)) sort_type = 'DATE';
      if (itm.match(/^\d\d\d\d[\/-]\d\d[\/-]\d\d/)) sort_type = 'STRING';
    }
    return sort_type;
}

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_getInnerText(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;
    //alert( Math.round(table.rows.length / 2) );
    // **************************************************************************
    // Get sample data from TOP and BOTTOM of table instead of just the top.
    // Prevents problems with customer id sorting where top data is numeric and
    // bottom data is alpha-numeric.
    // **************************************************************************
    var itm = "";
    itm = ts_getInnerText(table.rows[1].cells[column]);
    var sort_type_top = ts_getSortType(itm);
    var sort_type_middle = sort_type_top; // Default
    var sort_type_bottom = sort_type_top; // Default
    if ( table.rows.length > 1 ) {
      itm = ts_getInnerText(table.rows[table.rows.length-1].cells[column]);
      sort_type_bottom = ts_getSortType(itm);
      itm = ts_getInnerText(table.rows[Math.round( table.rows.length / 2 )].cells[column]);
      sort_type_middle = ts_getSortType(itm);
    }
    //alert("T:" + sort_type_top + "\nM:" + sort_type_middle + "\nB:" + sort_type_bottom );
    if ( ( sort_type_top != sort_type_bottom ) || ( sort_type_top != sort_type_middle ) ) {
      sort_type_top = 'STRING';
    }
    sortfn = ts_sort_caseinsensitive; // Default
    switch( sort_type_top ) {
      case 'STRING':
        sortfn = ts_sort_caseinsensitive;
        break;
      case 'CURRENCY':
        sortfn = ts_sort_currency;
        break;
      case 'NUMERIC':
        sortfn = ts_sort_numeric;
        break;
      case 'DATE':
        sortfn = ts_sort_date;
        break;
    }
    
    // **************************************************************************
    //var itm = ts_getInnerText(table.rows[1].cells[column]);
    //alert( 'SORT_FN: ' + sortfn ); // -ELK
    //alert( "ITM: '" + itm + "'" ); // -ELK
    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') {
        //ARROW = '&nbsp;&nbsp;&uarr;'; // Rem'd. -ELK
        ARROW = 'v';
        newRows.reverse();
        span.setAttribute('sortdir','up');
    } else {
        //ARROW = '&nbsp;&nbsp;&darr;'; // Rem'd. -ELK
        ARROW = '^';
        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 = '&nbsp;&nbsp;&nbsp;'; // Rem'd. -ELK
                allspans[ci].innerHTML = '&nbsp;';
            }
        }
    }
        
    span.innerHTML = '&nbsp;' + ARROW;
}

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_getInnerText(a.cells[SORT_COLUMN_INDEX]);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]);
    if (aa.length == 10) {
        //dt1 = aa.substr(6,4)+aa.substr(3,2)+aa.substr(0,2); // Rem'd. -ELK
        dt1 = aa.substr(6,4)+aa.substr(0,2)+aa.substr(3,2); // -ELK
    } 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);
    }
    //alert( 'DT1: ' + dt1 ); // -ELK
    if (bb.length == 10) {
        //dt2 = bb.substr(6,4)+bb.substr(3,2)+bb.substr(0,2); // Rem'd. -ELK
        dt2 = bb.substr(6,4)+bb.substr(0,2)+bb.substr(3,2); // -ELK
    } 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_getInnerText(a.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.-]/g,''); // Added - to fix negative sorts. -ELK
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.-]/g,''); // Added - to fix negative sorts. -ELK
    return parseFloat(aa) - parseFloat(bb);
}

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

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


function addEvent(elm, evType, fn, useCapture)
// addEvent and removeEvent
// cross-browser event handling for IE5+,  NS6 and Mozilla
// By Scott Andrew
{
  if (elm.addEventListener){
    elm.addEventListener(evType, fn, useCapture);
    return true;
  } else if (elm.attachEvent){
    var r = elm.attachEvent("on"+evType, fn);
    return r;
  } else {
    alert("Handler could not be removed");
  }
}