//
//
//  Modifications
//  	09/28/07 - Fixed the sort bottom stuff so it works  <tr> id="sortbottom"></tr>  will take the bottom row out of being sorted
//				 - DO NOT add &nbsp; or blanks after numerics -- this gets all bent out of shape about it

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);
		if (ts_getInnerText(cell.id).toLowerCase() == "sortcolumn")		
	        cell.innerHTML = '<a href="#" class="sortheader" onclick="ts_resortTable(this);return false;">'+txt+'<span class="sortarrow">&nbsp;</span></a>'; //was 3 spaces
    }
}

function ts_getInnerText(el) {
	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;
//alert("cs.length="+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;
		}
//alert("i=" + i + "  cs[i].nodeType=" + cs[i].nodeType + "str=" + trim(str));
	}
	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_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;
    var itm = ts_getInnerText(table.rows[1].cells[column]);
	//    sortfn = ts_sort_default;
    sortfn = ts_sort_caseinsensitive;		// set default in case nothing matches
	if ((table.rows[0].cells[column].type) != null) {
		//var type = table.rows[0].cells[column].type.toLowerCase();
		switch(table.rows[0].cells[column].type.toLowerCase()) {
			case 'date':
//alert("date");
			  sortfn = ts_sort_date;
			  break;    
			case 'numeric':
//alert("numeric");
			  sortfn = ts_sort_numeric;
			  break;
			case 'currency':
//alert("currency");
			  sortfn = ts_sort_currency;
			   break;
			default:
//alert("default");
			  sortfn = ts_sort_caseinsensitive;
			}
		}
	else {	
	
		var dateRegex = "^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)?[0-9]{2}";
	    if (itm.match(dateRegex)) {
//alert("matching date");   
			sortfn = ts_sort_date;
			}
	    else if (itm.match(/^[£$]/)) {
//alert("matching currency");
			sortfn = ts_sort_currency;
			}
	    else if (itm.match(/^[-\d\.]/)) {
//alert("matching numeric");
			sortfn = ts_sort_numeric;
			}
		else {	
//alert("matching default");
			  sortfn = ts_sort_caseinsensitive;
			}  
		}

    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") == 'up') {
        ARROW = '&uarr;';
        newRows.reverse();
        span.setAttribute('sortdir','down');
    } else {
        ARROW = '&darr;';
        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].id || (newRows[i].id && (newRows[i].id != 'sortbottom'))) {
			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;';								//Number of spaces where the arrow is (was 3)
            }
        }
    }

    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) {  //UK format dates (dd/mm/[cc]yy) changed to US format mm-dd-[cc]yy  ==> yyyymmdd
    // 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]);

//alert("date aa=" + aa + "  bb=" + bb);

    if (aa.length == 10) {
        dt1 = aa.substr(6,4)+aa.substr(0,2)+aa.substr(3,2);
    } else {
        yr = aa.substr(6,2);
        if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
        dt1 = yr+aa.substr(0,2)+aa.substr(3,2);
    }
    if (bb.length == 10) {
        dt2 = bb.substr(6,4)+bb.substr(0,2)+bb.substr(3,2);
    } else {
        yr = bb.substr(6,2);
        if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
        dt2 = yr+bb.substr(0,2)+bb.substr(3,2);
    }
//alert("date dt1=" + dt1 + "  dt2=" + dt2);
	
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
}

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

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

function ts_sort_caseinsensitive(a,b) {
//alert("ts_sort_caseinsensitive");
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]).toLowerCase();
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]).toLowerCase();
//alert("caseinsensitive aa=" + aa + "  bb=" + bb);
 
    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]);
//alert("default aa=" + aa + "  bb=" + bb);
    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");
  }
}