/*FUNCION LIGHTBOX*/

function SysBounds(top, left, clientWidth, clientHeight)
{
	this.top = top;
	this.left = left;
	this.height = clientHeight;
	this.width = clientWidth;
}

function getClientBounds () {
	isOPERA = (navigator.userAgent.indexOf('Opera') >= 0)? true : false;
	isIE    = (document.all && !isOPERA)? true : false;
	isDOM   = (document.getElementById && !isIE)? true : false;
    var clientWidth;
    var clientHeight;
    if (isIE)
    {
		clientWidth = document.documentElement.clientWidth;
        clientHeight = document.documentElement.clientHeight;  
	}
	else if(isDOM) 
	{
		clientWidth = window.innerWidth;
        clientHeight = window.innerHeight;
	}
	else if(isOpera)
	{	
		clientWidth = Math.min(window.innerWidth, document.body.clientWidth);
        clientHeight = Math.min(window.innerHeight, document.body.clientHeight);        
	}
	else
	{
		clientWidth = Math.min(window.innerWidth, document.documentElement.clientWidth);
        clientHeight = Math.min(window.innerHeight, document.documentElement.clientHeight);
    }
	return new SysBounds(0, 0, clientWidth, clientHeight);
}
    
function getCurrentStyle(element, attribute, defaultValue) {
	var currentValue = null;
    if (element) {
		if (element.currentStyle) {
			currentValue = element.currentStyle[attribute];
        } else if (document.defaultView && document.defaultView.getComputedStyle) {
			var style = document.defaultView.getComputedStyle(element, null);
            if (style) {
				currentValue = style[attribute];
            }
		}
            
		if (!currentValue && element.style.getPropertyValue) {
			currentValue = element.style.getPropertyValue(attribute);
		}
		else if (!currentValue && element.style.getAttribute) {
			currentValue = element.style.getAttribute(attribute);
		}       
	}
        
	if ((!currentValue || currentValue == "" || typeof(currentValue) === 'undefined')) {
		if (typeof(defaultValue) != 'undefined') {
			currentValue = defaultValue;
		}
		else {
			currentValue = null;
		}
	}   
	return currentValue;  
}



document.getElementsByClassName = function(cl) {   
    var retnode = [];   
    var myclass = new RegExp('\\b'+cl+'\\b');   
    var elem = this.getElementsByTagName('*');   
    for (var i = 0; i < elem.length; i++) {   
        var classes = elem[i].className;   
        if (myclass.test(classes)) retnode.push(elem[i]);   
    }   
    return retnode;   
}

/*
document.getElementsByClassName = function(cl, sTagName) {   
    var retnode = [];   
    var myclass = new RegExp('\\b'+cl+'\\b');   
    var elem = this.getElementsByTagName((sTagName===""||sTagName===null)?"*":sTagName);   
    for (var i = 0; i < elem.length; i++) {   
        var classes = elem[i].className;   
        if (myclass.test(classes)) retnode.push(elem[i]);   
    }   
    return retnode;   
};  
*/

function openFade(foregroundElement, idx)
{

	foregroundElement = document.getElementsByClassName(foregroundElement);
	//foregroundElement = document.getElementById(foregroundElement);
	foregroundElement = foregroundElement[idx];
	try
	{
		document.getElementById('back_div').parentNode.removeChild(document.getElementById('back_div'));
	}
	catch(e){}
	try
	{
		//hideSelectBoxes();
		backgroundElement = document.createElement('div');
		backgroundElement.id='back_div';
		backgroundElement.style.display = 'none';
		backgroundElement.style.position = 'absolute';
		backgroundElement.style.left = '0px';
		backgroundElement.style.top = '0px';
		var clientBounds = getClientBounds();		
		var clientWidth = clientBounds.width;
		var clientHeight = clientBounds.height;
		//fix: bug no resuelto para IE y Firefox. Problema con scrollbars
		if(document.all)
		{
			backgroundElement.style.width = Math.max(Math.max(document.documentElement.scrollWidth, document.body.scrollWidth), clientWidth) +'px';
		}
		else
		{
			backgroundElement.style.width = Math.max(Math.max(document.documentElement.scrollWidth, document.body.scrollWidth), clientWidth) -18 +'px';
		}
		backgroundElement.style.height = Math.max(Math.max(document.documentElement.scrollHeight, document.body.scrollHeight), clientHeight)+'px';

		backgroundElement.style.top = '0px';
		backgroundElement.style.zIndex = 991;
		backgroundElement.className = 'lightbox';

		document.body.appendChild(backgroundElement);
		backgroundElement.style.display = 'block';
		try
		{
			foregroundElement.style.zIndex = parseInt(getCurrentStyle(backgroundElement, 'zIndex', 
			backgroundElement.style.zIndex)) + 1;
			foregroundElement.style.display = 'block';
			foregroundElement.style.visibility = "hidden";
			var scrollLeft = (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft);
			var scrollTop = (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop);
			foregroundElement.style.left = scrollLeft+((clientWidth-foregroundElement.offsetWidth)/2)+'px';
	//	    foregroundElement.style.top = 10 +'px'; //para ventana centrada a 10 pixeles del borde superior
	   		foregroundElement.style.top = scrollTop+((clientHeight-foregroundElement.offsetHeight)/2)+'px'; //para ventana centrada en el alto
			foregroundElement.style.visibility = "visible";
		}
		catch(e){alert('1' + e.Description);}
	}
    catch(e){alert('2' + e.Description);}
}

function closeFade(foregroundElement, idx)
{
	foregroundElement = document.getElementsByClassName(foregroundElement);
	foregroundElement = foregroundElement[idx];
	try{document.getElementById('back_div').parentNode.removeChild(document.getElementById('back_div'));}catch(e){}
	//showSelectBoxes();
	foregroundElement.style.display = 'none';
	foregroundElement.style.visibility = 'hidden';
}

/*Drag&Drop*/


var browser = new Browser();

// Global object to hold drag information.

var dragObj = new Object();
//dragObj.zIndex = 0;

function dragStart(event, id) {
var el;
var x, y;
//dragObj.elNode = $get(id);
if (document.getElementById){
	dragObj.elNode = id;
}else {
	if (document.all){
		dragObj.elNode = event.target;
    }
    else
    {
        dragObj.elNode = window.event.srcElement;
    }
	if (dragObj.elNode.nodeType == 3)
	dragObj.elNode = dragObj.elNode.parentNode;
}

// Get cursor position with respect to the page.
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;
}
if (browser.isOpera) {
	x = window.event.clientX + document.documentElement.scrollLeft + document.body.scrollLeft;
	y = window.event.clientY + document.documentElement.scrollTop + document.body.scrollTop;
}
// Save starting positions of cursor and element.

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 = offsetLeft(dragObj);  
    if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = offsetLeft(dragObj.elNode);
}
if (isNaN(dragObj.elStartTop))  {
    dragObj.elStartTop = offsetTop(dragObj);
    if (isNaN(dragObj.elStartTop)) dragObj.elStartTop  = offsetTop(dragObj.elNode);
}
// Update element's z-index.

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

// Capture mousemove and mouseup events on the page.

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

function dragGo(event) {

var x, y;

// Get cursor position with respect to the page.

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;
}

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

// Move drag element by the same amount the cursor has moved.

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();
}
if (browser.isOpera) {
	window.event.cancelBubble = true;
	window.event.returnValue = false;
}
}
function dragStop(event) {

// Stop capturing mousemove and mouseup events.

if (browser.isIE) {
	document.detachEvent("onmousemove", dragGo);
	document.detachEvent("onmouseup",   dragStop);
}
if (browser.isNS) {
	document.removeEventListener("mousemove", dragGo,   true);
	document.removeEventListener("mouseup",   dragStop, true);
}
if (browser.isOpera) {
	document.removeEventListener("mousemove", dragGo,   false);
	document.removeEventListener("mouseup",   dragStop, false);
}
}
function offsetLeft(el)
{
    x = el.offsetLeft
    for (e = el.offsetParent; e; e = e.offsetParent)
    x += e.offsetLeft;
    return x
} 
function offsetTop(el)
{
    y = el.offsetTop
    for (e = el.offsetParent; e; e = e.offsetParent)
    y += e.offsetTop;
    return y
}