var SORT_COLUMN_INDEX;
var SORT_ATTRIBUTE;

function ts_getInnerText(el, attribute) {
	if (attribute != null && el.getAttribute (attribute) != null) return el.getAttribute (attribute);
	if (typeof el == "string") return el;
	if (typeof el == "undefined") { return el };
	if (el.innerText) return el.innerText;	//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_getInnerText(cs[i]);
				break;
			case 3:	//TEXT_NODE
				str += cs[i].nodeValue;
				break;
		}
	}
	return str;
}

function ts_resortTable(lnk, clid, attribute) {
    // 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 td = lnk.parentNode;
    var column = clid || td.cellIndex;
    var table = getParent(td,'TABLE');
    
    // Work out a type for the column
    if (table.rows.length <= 1) return;
    var itm = ts_getInnerText (table.rows[1].cells[column], attribute);
    sortfn = ts_sort_caseinsensitive;
    if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/)) sortfn = ts_sort_date;
    if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/)) sortfn = ts_sort_date;
    if (itm.match(/^[£$]/)) sortfn = ts_sort_currency;
    if (itm.match(/^[\/-]?[\d\.]+$/)) sortfn = ts_sort_numeric;
    SORT_COLUMN_INDEX = column;
	SORT_ATTRIBUTE = attribute;
    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 = 0 ; j < table.tBodies[0].rows.length ; j ++)
		newRows[j] = table.tBodies[0].rows[j];

    newRows.sort(sortfn);

    if (span.getAttribute("sortdir") == 'up')
	{
        ARROW = '&nbsp;&uarr;';
        span.setAttribute('sortdir','down');
    } else {
        ARROW = '&nbsp;&darr;';
        newRows.reverse();
        span.setAttribute('sortdir','up');
    }
    
    // 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?
				if (allspans[ci] != span)
				{
					allspans[ci].innerHTML = ''; //'&nbsp;&nbsp;&nbsp;';
					allspans[ci].setAttribute ('sortdir', null);
				}
            }
        }
    }
        
    span.innerHTML = 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], SORT_ATTRIBUTE);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX], SORT_ATTRIBUTE);
    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_getInnerText(a.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.]/g,'', SORT_ATTRIBUTE);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.]/g,'', SORT_ATTRIBUTE);
    return parseFloat(aa) - parseFloat(bb);
}

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

function ts_sort_caseinsensitive(a, b) {
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX], SORT_ATTRIBUTE).toLowerCase();
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX], SORT_ATTRIBUTE).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], SORT_ATTRIBUTE);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX], SORT_ATTRIBUTE);
    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");
  }
}