var browser = new Browser();
var dragObj = new Object();
dragObj.zIndex = 0;
var dragFlag = false;
var dragStartFlag = false;
var oldDrag;
var curDrag;

function Browser() {
	var ua, s, i;
	this.isIE    = false;
	this.isNS    = false;
	this.version = null;

	ua = navigator.userAgent;

	s = "MSIE";
	if ((i = ua.indexOf(s)) >= 0) {
		this.isIE = true;
		this.version = parseFloat(ua.substr(i + s.length));
		return;
	}

	s = "Netscape6/";
	if ((i = ua.indexOf(s)) >= 0) {
		this.isNS = true;
		this.version = parseFloat(ua.substr(i + s.length));
		return;
	}

	s = "Gecko";
	if ((i = ua.indexOf(s)) >= 0) {
		this.isNS = true;
		this.version = 6.1;
		return;
	}
}
function dragStart(event, id) {
	if((dragStartFlag == false) && (dragFlag == false)) {
		dragStartFlag = true;
		var el;
		var x, y;
		if (id) {
			dragObj.elNode = document.getElementById(id);
			oldDrag = curDrag;
			curDrag = dragObj.elNode;
			if(oldDrag) {
				oldDrag.style.backgroundColor = "transparent";
				oldDrag.style.border = "0px solid #888888";
			}
			curDrag.style.backgroundColor = "#EEEEEE";
			curDrag.style.border = "1px solid #888888";

		}else {
			if (browser.isIE)
				dragObj.elNode = window.event.srcElement;
			if (browser.isNS)
				dragObj.elNode = event.target;
			if (dragObj.elNode.nodeType == 3)
				dragObj.elNode = dragObj.elNode.parentNode;
		}

		if (browser.isIE) {
			x = window.event.clientX + document.documentElement.scrollLeft
			+ document.body.scrollLeft;
			y = window.event.clientY + document.documentElement.scrollTop
			+ document.body.scrollTop;
		}

		if (browser.isNS) {
			x = event.clientX + window.scrollX;
			y = event.clientY + window.scrollY;
		}

		dragObj.cursorStartX = x;
		dragObj.cursorStartY = y;
		dragObj.elStartLeft  = parseInt(dragObj.elNode.style.left, 10);
		dragObj.elStartTop   = parseInt(dragObj.elNode.style.top,  10);

		if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 0;
		if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = 0;

		dragObj.elNode.style.zIndex = ++dragObj.zIndex;

		if (browser.isIE) {
			document.attachEvent("onmousemove", dragGo);
			document.attachEvent("onmouseup",   dragStop);
			window.event.cancelBubble = true;
			window.event.returnValue = false;
		}

		if (browser.isNS) {
			document.addEventListener("mousemove", dragGo,   true);
			document.addEventListener("mouseup",   dragStop, true);
			event.preventDefault();
		}
	}
}

function dragGo(event) {
	var x, y;
	if (browser.isIE) {
		x = window.event.clientX + document.documentElement.scrollLeft
		+ document.body.scrollLeft;
		y = window.event.clientY + document.documentElement.scrollTop
		+ document.body.scrollTop;
	}

	if (browser.isNS) {
		x = event.clientX + window.scrollX;
		y = event.clientY + window.scrollY;
	}

	dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
	dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY) + "px";

	if (browser.isIE) {
		window.event.cancelBubble = true;
		window.event.returnValue = false;
	}

	if (browser.isNS)
		event.preventDefault();
}


function dragStop(event) {
	if (browser.isIE) {
		document.detachEvent("onmousemove", dragGo);
		document.detachEvent("onmouseup",   dragStop);
	}
	if (browser.isNS) {
		document.removeEventListener("mousemove", dragGo,   true);
		document.removeEventListener("mouseup",   dragStop, true);
	}

	fixOrder();
	
	dragStartFlag = false;
}

function fixOrder(){
	divTops = new Array();
	if(dragObj.elNode.parentNode.hasChildNodes()){
		for(var i=0; i<dragObj.elNode.parentNode.childNodes.length; i++){
			divTops[i] = [findPosY(dragObj.elNode.parentNode.childNodes[i]), dragObj.elNode.parentNode.childNodes[i].id];
		}
	}
	divOrdered = sortArr(divTops);

	for(var i=0; i<divOrdered.length; i++){
		var childObj = document.getElementById(divOrdered[i][1]);
		dragObj.elNode.parentNode.appendChild(childObj);
	}	
	fixPox();
}
function fixPox(){
	var containerPosX = findPosX(dragObj.elNode.parentNode);
	var containerPosY = findPosY(dragObj.elNode.parentNode);

	var divPosX = 0;
	var divPosY = 0;

	if(dragObj.elNode.parentNode.hasChildNodes()){
		for(var i=0; i<dragObj.elNode.parentNode.childNodes.length; i++){
			dragObj.elNode.parentNode.childNodes[i].style.position = "absolute"; 
			dragObj.elNode.parentNode.childNodes[i].style.left = divPosX + containerPosX;
			dragObj.elNode.parentNode.childNodes[i].style.top = divPosY + containerPosY;
			divPosY = divPosY + dragObj.elNode.parentNode.childNodes[i].offsetHeight;
		}
	}
	dragObj.elNode.parentNode.style.height = 	divPosY;
}
function findPosX(obj) {
	var curleft = 0;
	if(obj) {
	if (obj.offsetParent) 	{
		while (obj.offsetParent) {
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x) {
		curleft += obj.x;
	}
	return curleft;
	}
}

function findPosY(obj) {
	var curtop = 0;
	if(obj) {
	if (obj.offsetParent) {
		while (obj.offsetParent) {
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.x) {
		curtop += obj.x;
	}
	return curtop;
	}
}
function sortArr(arraySort){
	for(var i=1; i<arraySort.length; i++){
		var k = i - 1;
		if(k>=0) {
			var val0 = arraySort[i][0];
			var val1 = arraySort[k][0];
			val0 = (isNaN(val0)) ? val0.toLowerCase() : val0;
			val1 = (isNaN(val1)) ? val1.toLowerCase() : val1;
		}
		if((k>=0) && (val0 < val1)) {
			for(j=0; j<arraySort[i].length; j++){
				var tmpval = arraySort[i][j];
				arraySort[i][j] = arraySort[k][j];
				arraySort[k][j] = tmpval;
			}
			i = k - 1;
		}
	}	
	return arraySort;
}
function addUnlimited(slot, item, max, showError){
	if((parseInt(item,10)>0) && (parseInt(item,10) >= parseInt(max,10))){
		if(showError) { 
			alert("Warning: Cannot upload more images for current slot.");
		}
		return item;
		
	}
	var containerObj = document.getElementById('div_' + slot + '_containerformore');
	var rowContainerObj = document.createElement('DIV');
	rowContainerObj.className = "dragbar";
	containerObj.appendChild(rowContainerObj);

	var rowContainerObj = document.createElement('DIV');
	rowContainerObj.style.paddingTop = "10px";
	var captionObj = document.createElement('DIV');
	captionObj.className = "smallcap left";
	captionObj.innerHTML = "<i>Alt text: </i>&nbsp;";
	rowContainerObj.appendChild(captionObj);

	var captionTextObj = document.createElement('INPUT');
	captionTextObj.type = "text";
	captionTextObj.className = "textbox";
	captionTextObj.size = 30;
	captionTextObj.value = '';
	captionTextObj.name = 'caption_' + slot + '_' + slot + '_' + item;
	rowContainerObj.appendChild(captionTextObj);

	containerObj.appendChild(rowContainerObj);

	var rowContainerObj = document.createElement('DIV');
	rowContainerObj.className = "spacerDiv";
	containerObj.appendChild(rowContainerObj);


	var rowContainerObj = document.createElement('DIV');
	var captionObj = document.createElement('DIV');
	captionObj.className = "smallcap left";
	captionObj.innerHTML = "<i>File: </i>&nbsp;";
	rowContainerObj.appendChild(captionObj);

	var captionTextObj = document.createElement('INPUT');
	captionTextObj.className = "textbox";
	captionTextObj.type = "file";
	captionTextObj.size = 40;
	captionTextObj.name = 'imagefile_' + slot + '_' + slot + '_' + item;
	rowContainerObj.appendChild(captionTextObj);
	rowContainerObj.style.paddingBottom = "10px";

	containerObj.appendChild(rowContainerObj);

	return ++item;


}