var dom = (document.getElementsByTagName) ? true : false;

var ie5 = (document.getElementsByTagName && document.all) ? true : false;

var arrowUp, arrowDown;

var firstTime = true;

if (ie5 || dom) initSortTable();

function initSortTable() 
{
	arrowUp = document.createElement("DIV");
	
	var tn = document.createElement("IMG");
	tn.src = '/HDSweb/FrameWork/zFrame/Images/SortAscActive.gif';
	tn.align = 'right';
	arrowUp.appendChild(tn);
	arrowUp.className = "arrow";

	arrowDown = document.createElement("DIV");
	
	var tn = document.createElement("IMG");
	tn.src = '/HDSweb/FrameWork/zFrame/Images/SortDescActive.gif';
	tn.align = 'right';
	arrowDown.appendChild(tn);
	arrowDown.className = "arrow";
}

function sortTable(tableNode, nCol, bDesc, sType) {
	var tBody = tableNode.tBodies[0];
	var trs = tBody.rows;
	var trl= trs.length;
	var a = new Array();
	
	for (var i = 0; i < trl; i++) {
		a[i] = trs[i];
	}
	
	var start = new Date;
	window.status = "Ordinamento dati...";
	a.sort(compareByColumn(nCol,bDesc,sType));
	window.status = "Ordinamento terminato";
	
	for (var i = 0; i < trl; i++) {
		a[i].setAttribute('rownumber', i);
		if ((i % 2)==0) {
			a[i].className = 'dataTableRowNormalEven';
		}else{
			a[i].className = 'dataTableRowNormalOdd';
		}
		tBody.appendChild(a[i]);
		window.status = "Aggiornamento riga " + (i + 1) + " di " + trl +
						" (Tempo impiegato: " + (new Date - start) + "ms)";
	}
	
	// check for onsort
	if (typeof tableNode.onsort == "string")
		tableNode.onsort = new Function("", tableNode.onsort);
	if (typeof tableNode.onsort == "function")
		tableNode.onsort();
}

function CaseInsensitiveString(s) {
	return String(s).toUpperCase();
}

function parseDate(s) {
	s = s.replace(/(\s)/g, '');	//questa replace l'ho fatta perché in Mozilla mi ritrovo 'acapo' dopo il testo
	if (s=='') {				//questo testo l'ho aggiunto per dare un valore alle date senza valore
		s='1900-01-01 00:00:00'
	}else{
		if (s.length > 10) {	// se la lunghezza è maggiore di 10 vuol dire che c'è anche l'ora (in formato hh:mm:ss)
			s = s.substring(6,10) + '-' + s.substring(3,5) + '-' + s.substring(0,2) + ' ' + s.substring(10, 18)	// le date le visualizzo sempre in formato gg/mm/aaaa, e quindi le converto in formato aaaa-mm-gg
		}else{
			s = s.substring(6,10) + '-' + s.substring(3,5) + '-' + s.substring(0,2)
		}
	}
	s = s.replace(/\-/g, '/')
	s = s.replace(/\./g, ':')
	return Date.parse(s);
}


function toNumber(s) {
    return Number(s.replace(/[^0-9\.]/g, ""));
}

function compareByColumn(nCol, bDescending, sType) {
	var c = nCol;
	var d = bDescending;
	
	var fTypeCast = String;
	
	if (sType == "Number")
		fTypeCast = Number;
	else if (sType == "Date")
		fTypeCast = parseDate;
	else if (sType == "CaseInsensitiveString")
		fTypeCast = CaseInsensitiveString;

	return function (n1, n2) {
		if (fTypeCast(getInnerText(n1.cells[c])) < fTypeCast(getInnerText(n2.cells[c])))
			return d ? -1 : +1;
		if (fTypeCast(getInnerText(n1.cells[c])) > fTypeCast(getInnerText(n2.cells[c])))
			return d ? +1 : -1;
		return 0;
	};
}

function sortColumnWithHold(e) {
	var el = ie5 ? e.srcElement : e.target;
	var table = getParent(el, "TABLE");
	
	var oldCursor = table.style.cursor;
	var oldClick = table.onclick;
	
	table.style.cursor = "wait";
	table.onclick = null;
	
	var fakeEvent = {srcElement : e.srcElement, target : e.target};
	
	window.setTimeout(function () {
		sortColumn(fakeEvent);
		table.style.cursor = oldCursor;
		table.onclick = oldClick;
	}, 100);
}

function sortColumn(e) {
	var tmp = e.target ? e.target : e.srcElement;
	var tHeadParent = getParent(tmp, "THEAD");
	var el = getParent(tmp, "TH");

	if (tHeadParent == null)
		return;
		
	if (el != null) {
		var p = el.parentNode;
		var i;
		el._descending = !Boolean(el._descending);

		if (tHeadParent.arrow != null) {
			if (tHeadParent.arrow.parentNode != el) {
				tHeadParent.arrow.parentNode._descending = null;	//reset sort order
				document.getElementById('divImg' + tHeadParent.arrow.parentNode.id + 'No').style.display = 'block';
				if (el.attributes.getNamedItem('defOrder').value == 1 || el.attributes.getNamedItem('defOrder').value == 2) {
					try {document.getElementById('divImg' + el.attributes.getNamedItem('idOrderTable').value + 'DefNo').style.display = 'none';} catch(e) {}
				}
			}
			
			document.getElementById('divImg' + tHeadParent.arrow.parentNode.id + 'Asc').style.display = 'none';
			document.getElementById('divImg' + tHeadParent.arrow.parentNode.id + 'Desc').style.display = 'none';
			tHeadParent.arrow.parentNode.removeChild(tHeadParent.arrow);
		}else{
			if (el.attributes.getNamedItem('defOrder').value == 0) {
				try {document.getElementById('divImg' + el.attributes.getNamedItem('idOrderTable').value + 'DefNo').style.display = 'block';} catch(e) {}
			}
			try {document.getElementById('divImg' + el.attributes.getNamedItem('idOrderTable').value + 'DefAsc').style.display = 'none';} catch(e) {}
			try {document.getElementById('divImg' + el.attributes.getNamedItem('idOrderTable').value + 'DefDesc').style.display = 'none';} catch(e) {}
		}

		if (el._descending) {
			tHeadParent.arrow = arrowUp.cloneNode(true);
			el.title = 'Ordinamento Decrescente';
		}else{
			tHeadParent.arrow = arrowDown.cloneNode(true);
			el.title = 'Ordinamento Crescente';
		}
		
		el.appendChild(tHeadParent.arrow);

			

		var cells = p.cells;
		var l = cells.length;
		for (i = 0; i < l; i++) {
			if (cells[i] == el) break;
		}

		var table = getParent(el, "TABLE");
		
		sortTable(table,i,el._descending, el.getAttribute("type"));
	}
}

var nodoPadre = '';
function getInnerText(el) 
{
//	if (ie5) 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
				nodoPadre = cs[i].tagName;	// memorizzo il nodo padre
				str += getInnerText(cs[i]);
				break;
			case 3:	//TEXT_NODE
				if (nodoPadre == 'ORD') {	// siccome nel TD può esserci anche dell'altro, l'ordinamento avviene solo con ciò che è dentro il tag <ORD>
					str += cs[i].nodeValue;
				}
				break;
		}
	}
	return str;
}

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);
}