addEvent(window, "load", sortTable);
addEvent(window, "load", colorTableRows);


/* http://kryogenix.org/code/browser/sorttable/
**************************************************************************/

var SORT_COLUMN_INDEX;

function sortTable() {
    // 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)) {
            st_makeSortable(thisTbl);
        }
    }
}

function st_makeSortable(table) {
        if (table.rows && table.rows.length > 0) {
                var firstRow = table.rows[0];
        }
        if (!firstRow) return;
        for (var i=0; i<firstRow.cells.length; i++) {
                var cell = firstRow.cells[i];
                var txt = st_getInnerText(cell);
                cell.innerHTML = '<a href="" class="sortheader" onclick="st_resortTable(this);return false;">'+txt+'<span class="sortarrow"></span></a>';
        }
}

function st_getInnerText(el) {
        if (typeof el == 'string') return el;
        if (typeof el == 'undefined') return el;
        if (el.innerText) return el.innerText;
        var str = '';
        var cs = el.childNodes;
        var l = cs.length;
        for (var i = 0; i < l; i++) {
                switch (cs[i].nodeType) {
                        case 1:
                                str += st_getInnerText(cs[i]);
                                break;
                        case 3:
                                str += cs[i].nodeValue;
                                break;
                }
        }
        return str;
}

function st_resortTable(lnk) {
        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 = st_getInnerText(span);
        var td = lnk.parentNode;
        var column = td.cellIndex;
        var table = st_getParent(td, 'TABLE');
        if (table.rows.length <= 1) return;
        var notDate = 0;
        var notCurrency = 0;
        var notNumerical = 0;
        for (var itmc=1; itmc<table.rows.length; itmc++) {
                var itm = st_getInnerText(table.rows[itmc].cells[column]);
                if (!(itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/) || (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/))))
                        notDate++;
                if (!(itm.match(/^[?£$]/)))
                        notCurrency++;
                if (!(itm.match(/^[\+-]?[\d\.,]+$/)))
                        notNumerical++;
        }
           switch (0) {
                   case notDate: sortfn = st_sortDate; break;
                   case notCurrency: sortfn = st_sortCurrency; break;
                   case notNumerical: sortfn = st_sortNumeric; break;
                   default: sortfn = st_sortCaseInsensitive;
           }
        sci = 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;';
                newRows.reverse();
                span.setAttribute('sortdir', 'up');
        } else {
                ARROW = '&nbsp;&nbsp;&darr;'; 
                span.setAttribute('sortdir', 'down');
        }
        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]); }
        for (i=0; i<newRows.length; i++) { if (newRows[i].className && (newRows[i].className.indexOf('sortbottom') != -1)) table.tBodies[0].appendChild(newRows[i]); }
        var allspans = document.getElementsByTagName('span');
        for (var ci=0; ci<allspans.length; ci++) {
                if (allspans[ci].className == 'sortarrow') {
                        if (st_getParent(allspans[ci], 'table') == st_getParent(lnk, 'table')) {
                                allspans[ci].innerHTML = '';
                        }
                }
        }
        span.innerHTML = ARROW;
        colorTableRows();
}

function st_getParent(el, pTagName) {
        if (el == null) return null;
        else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase())
                return el;
        else
                return st_getParent(el.parentNode, pTagName);
}

function st_sortDate(a, b) {
        aa = st_getInnerText(a.cells[sci]);
        bb = st_getInnerText(b.cells[sci]);
        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 st_sortCurrency(a, b) {
        aa = st_getInnerText(a.cells[sci]).replace(/[^0-9.]/g, '');
        bb = st_getInnerText(b.cells[sci]).replace(/[^0-9.]/g, '');
        return parseFloat(aa) - parseFloat(bb);
}

function st_sortNumeric(a, b) {
        aa = parseFloat(st_getInnerText(a.cells[sci]));
        if (isNaN(aa)) aa = 0;
        bb = parseFloat(st_getInnerText(b.cells[sci]));
        if (isNaN(bb)) bb = 0;
        return aa-bb;
}

function st_sortCaseInsensitive(a, b) {
        aa = st_getInnerText(a.cells[sci]).toLowerCase();
        bb = st_getInnerText(b.cells[sci]).toLowerCase();
        if (aa==bb) return 0;
        if (aa<bb) return -1;
        return 1;
}

function st_sortDefault(a, b) {
        aa = st_getInnerText(a.cells[sci]);
        bb = st_getInnerText(b.cells[sci]);
        if (aa==bb) return 0;
        if (aa<bb) return -1;
        return 1;
}


/* http://ktk.xs4all.nl/stuff/javascript/table-row-alternate/
**************************************************************************/

function colorTableRows() {
    // Find all tables with class sortable and make them sortable
    if (!document.getElementsByTagName) return;
    var tables = document.getElementsByTagName('table');
    for (var i = 0; i < tables.length; i++) {
        thisTbl = tables[i];
        if (((' '+thisTbl.className+' ').indexOf("sortable") != -1) && (thisTbl.id)) {
            var trs = tables[i].getElementsByTagName('tr');
            for (var j = 1; j < trs.length; j++) {
              trs[j].className = (j % 2 == 0 ? '' : 'alternate');
            }
        }
    }
}


/* Load the scripts
**************************************************************************/

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");
  }
}