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;&nbsp;&nbsp;</span></a>';
	}
}

function ts_getInnerText(el) {
	if (typeof el == "string") return el;
	if (typeof el == "undefined") {
		return el
	}
	// Controleer of er een extra span child class aanwezig is. Deze waarde dan gebruiken
	var spanChilds = el.getElementsByTagName("span");
	if (spanChilds.length > 0) {
		return spanChilds[0].firstChild.nodeValue;
	}

	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) {
	// 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_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;
	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 = 'downarrow';
		newRows.reverse();
		span.setAttribute('sortdir', 'up');
	} else {
		ARROW = 'uparrow';
		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 == 'downarrow' || allspans[ci].className == 'uparrow') {
			if (getParent(allspans[ci], "table") == getParent(lnk, "table")) { // in the same table as us?
				allspans[ci].innerHTML = '&nbsp;&nbsp;&nbsp;';
				allspans[ci].setAttribute('class', 'sortarrow');
				allspans[ci].setAttribute('className', 'sortarrow');
			}
		}
	}

	span.setAttribute('class', ARROW);
	span.setAttribute('className', 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);
	} 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, '');
	bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.]/g, '');
	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;
}