var indicator_img_path = "images/indicator.gif";
var indicator_img_html = "<img name=\"ibox_indicator\" src=\""+indicator_img_path+"\" alt=\"Cargando...\" style=\"width:128px;height:128px;\"/>";

var opacity_level = 8;
var ibAttr = "rel";

var imgPreloader = new Image();
function init_ibox() {
	var elem_wrapper = "ibox";
	createIbox(document.getElementsByTagName("body")[0]); //create our ibox
	var docRoot = document.getElementsByTagName("a");
	var e;
	for (var i = 0; i < docRoot.length - 1; i++) {
			e = docRoot[i];
			if(e.getAttribute(ibAttr)) {
				var t = e.getAttribute(ibAttr);
				if ((t.indexOf("ibox") != -1)  ||  t.toLowerCase() == "ibox") { // check if this element is an iBox element
						e.onclick = function() { // rather assign an onclick event
							var t = this.getAttribute(ibAttr);
							var params = parseQuery(t.substr(5,999));
							var url = this.href;
							if(this.target != "") {url = this.target}
							var title = this.title;
							if(showIbox(url,title,params)) {
								showBG();
								window.onscroll = maintPos;
								window.onresize = maintPos;
							}
							return false;
						};
				}
			}
     }
}

showBG = function() {
	var box_w = getElem('ibox_w');
	box_w.style.opacity = 0;
	box_w.style.filter = 'alpha(opacity=0)';
	setBGOpacity = setOpacity;
	for (var i=0;i<=opacity_level;i++) {setTimeout("setIboxOpacity('ibox_w',"+i+")",70*i);} // from quirksmode.org
	box_w.style.display = "";
	var pagesize = new getPageSize();
	var scrollPos = new getScrollPos();
	var ua = navigator.userAgent;
	if(ua.indexOf("MSIE ") != -1) {box_w.style.width = pagesize.width+'px';}
	box_w.style.height = pagesize.height+scrollPos.scrollY+'px';
}

hideBG = function() {
	var box_w = getElem('ibox_w');
	box_w.style.display = "none";
}

var loadCancelled = false;
showIndicator = function() {
	var ibox_p = getElem('ibox_progress');
	ibox_p.style.display = "";
	posToCenter(ibox_p);
	ibox_p.onclick = function() {hideIbox();hideIndicator();loadCancelled = true;}
}

hideIndicator = function() {
	var ibox_p = getElem('ibox_progress');
	ibox_p.style.display = "none";
	ibox_p.onclick = null;
}

createIbox = function(elem) {
	var strHTML = "<div id=\"ibox_w\" style=\"display:none;\"></div>";
	strHTML +=	"<div id=\"ibox_progress\" style=\"display:none;\">";
	strHTML +=  indicator_img_html;
	strHTML +=  "</div>";
	strHTML +=	"<div id=\"ibox_wrapper\" style=\"display:none\">";
	strHTML +=	"<div id=\"ibox_content\"></div>";
	strHTML +=	"<div id=\"ibox_footer_wrapper\"><div id=\"ibox_close\" style=\"float:right;\">";
	strHTML +=	"<a id=\"ibox_close_a\"  href=\"javascript:void(null);\"><img src=\"images/closelabel.gif\"></a></div>";
	strHTML +=  "<div id=\"ibox_footer\">&nbsp;</div></div></div></div>";
	var docBody = document.getElementsByTagName("body")[0];
	var ibox = document.createElement("div");
	ibox.setAttribute("id","ibox");
	ibox.style.display = '';
	ibox.innerHTML = strHTML;
	elem.appendChild(ibox);
}

var ibox_w_height = 0;
showIbox = function(url,title,params) {
	var ibox = getElem('ibox_wrapper');
	var ibox_type = 0;
	var ibox_footer = getElem('ibox_footer');
	if(title != "") {ibox_footer.innerHTML = "<strong>"+title+"</strong>";} else {ibox_footer.innerHTML = "&nbsp;";}
	var urlString = /\.jpg|\.jpeg|\.png|\.gif|\.html|\.htm|\.php|\.cfm|\.asp|\.aspx|\.jsp|\.jst|\.rb|\.rhtml|\.txt/g;
	var urlType = url.match(urlString);
	if(urlType == '.jpg' || urlType == '.jpeg' || urlType == '.png' || urlType == '.gif'){
		ibox_type = 1;
	} else if(url.indexOf("#") != -1) {
		ibox_type = 2;
	} else if(urlType=='.htm'||urlType=='.html'||urlType=='.php'||
			 urlType=='.asp'||urlType=='.aspx'||urlType=='.jsp'||
			 urlType=='.jst'||urlType=='.rb'||urlType=='.txt'||urlType=='.rhtml'||
			 urlType=='.cfm') {
		ibox_type = 3;
	} else {
		if(params['type']) {ibox_type = parseInt(params['type']);}
		else{hideIbox();return false;}
	}
	ibox_type = parseInt(ibox_type);
	switch(ibox_type) {
		case 1:
			showIndicator();
			imgPreloader = new Image();
			imgPreloader.onload = function(){
				imgPreloader = resizeImageToScreen(imgPreloader);
				hideIndicator();
				var strHTML = "<img name=\"ibox_img\" src=\""+url+"\" style=\"width:"+imgPreloader.width+"px;height:"+imgPreloader.height+"px;border:0;cursor:hand;margin:0;padding:0;position:absolute;\"/>";
				if(loadCancelled == false) {
					ibox.style.height = imgPreloader.height+'px';
					ibox.style.width = imgPreloader.width+'px';
					ibox.style.display = "";
					ibox.style.visibility = "hidden";
					posToCenter(ibox);
					ibox.style.visibility = "visible";
					setIBoxContent(strHTML);
				}
			}
			loadCancelled = false;
			imgPreloader.src = url;
			break;
		case 2:
			var strHTML = "";
			if(params['height']) {ibox.style.height = params['height']+'px';}
			else {ibox.style.height = '280px';}
			if(params['width']) {ibox.style.width = params['width']+'px';}
			else {ibox.style.width = '450px';}
			ibox.style.display = "";
			ibox.style.visibility = "hidden";
			posToCenter(ibox);
			ibox.style.visibility = "visible";
			getElem('ibox_content').style.overflow = "auto";
			var elemSrcId = url.substr(url.indexOf("#") + 1,1000);
			var elemSrc = getElem(elemSrcId);
			if(elemSrc) {strHTML = elemSrc.innerHTML;}
			setIBoxContent(strHTML);
			break;
		case 3:
			showIndicator();
			http.open('get',url,true);
			http.onreadystatechange = function() {
				if(http.readyState == 4){
					hideIndicator();
					if(params['height']) {ibox.style.height = params['height']+'px';}
					else {ibox.style.height = '280px';}
					if(params['width']) {ibox.style.width = params['width']+'px';}
					else {ibox.style.width = '450px';}
					ibox.style.display = "";
					ibox.style.visibility = "hidden";
					posToCenter(ibox);
					ibox.style.visibility = "visible";
					getElem('ibox_content').style.overflow = "auto";
					var response = http.responseText;
					setIBoxContent(response);
				}
			}
			http.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
			http.send(null);
			break;
		default:
	 }
	ibox.style.opacity = 0;
	ibox.style.filter = 'alpha(opacity=0)';
	var ibox_op_level = 10;
	setIboxOpacity = setOpacity;
	for (var i=0;i<=ibox_op_level;i++) {setTimeout("setIboxOpacity('ibox_wrapper',"+i+")",30*i);}
	if(ibox_type == 2 || ibox_type == 3) {
		ibox.onclick = null;getElem("ibox_close_a").onclick = function() {hideIbox();}
	} else {ibox.onclick = hideIbox;getElem("ibox_close_a").onclick = null;}
	return true;
}

setOpacity = function (elemid,value)	{
		var e = getElem(elemid);
		e.style.opacity = value/10;
		e.style.filter = 'alpha(opacity=' + value*10 + ')';
}

resizeImageToScreen = function(objImg) {
	var pagesize = new getPageSize();
	var x = pagesize.width - 100;
	var y = pagesize.height - 100;
	if(objImg.width > x) {
		objImg.height = objImg.height * (x/objImg.width);
		objImg.width = x;
		if(objImg.height > y) {
			objImg.width = objImg.width * (y/objImg.height);
			objImg.height = y;
		}
	}

	else if(objImg.height > y) {
		objImg.width = objImg.width * (y/objImg.height);
		objImg.height = y;
		if(objImg.width > x) {
			objImg.height = objImg.height * (x/objImg.width);
			objImg.width = x;
		}
	}
	return objImg;
}

maintPos = function() {
	var ibox = getElem('ibox_wrapper');
	var box_w = getElem('ibox_w');
	var pagesize = new getPageSize();
	var scrollPos = new getScrollPos();
	var ua = navigator.userAgent;
	if(ua.indexOf("MSIE ") != -1) {box_w.style.width = pagesize.width+'px';}
	if(ua.indexOf("Opera/9") != -1) {box_w.style.height = document.body.scrollHeight+'px';}
	else {box_w.style.height = pagesize.height+scrollPos.scrollY+'px';}
	posToCenter(ibox);
}

hideIbox = function() {
	hideBG();
	var ibox = getElem('ibox_wrapper');
	ibox.style.display = "none";
	clearIboxContent();
	window.onscroll = null;
}

posToCenter = function(elem) {
	var scrollPos = new getScrollPos();
	var pageSize = new getPageSize();
	var emSize = new getElementSize(elem);
	var x = Math.round(pageSize.width/2) - (emSize.width /2) + scrollPos.scrollX;
	var y = Math.round(pageSize.height/2) - (emSize.height /2) + scrollPos.scrollY;
	elem.style.left = x+'px';
	elem.style.top = y+'px';
}

getScrollPos = function() {
	var docElem = document.documentElement;
	this.scrollX = self.pageXOffset || (docElem&&docElem.scrollLeft) || document.body.scrollLeft;
	this.scrollY = self.pageYOffset || (docElem&&docElem.scrollTop) || document.body.scrollTop;
}

getPageSize = function() {
	var docElem = document.documentElement
	this.width = self.innerWidth || (docElem&&docElem.clientWidth) || document.body.clientWidth;
	this.height = self.innerHeight || (docElem&&docElem.clientHeight) || document.body.clientHeight;
}

getElementSize = function(elem) {
	this.width = elem.offsetWidth ||  elem.style.pixelWidth;
	this.height = elem.offsetHeight || elem.style.pixelHeight;
}

setIBoxContent = function(str) {
	clearIboxContent();
	var e = getElem('ibox_content');
	e.style.overflow = "auto";
	e.innerHTML = str;
}
clearIboxContent = function() {
	var e = getElem('ibox_content');
	e.innerHTML = "";
}

getElem = function(elemId) {
	return document.getElementById(elemId);
}

parseQuery = function(query) {
   var Params = new Object ();
   if (!query) return Params;
   var Pairs = query.split(/[;&]/);
   for ( var i = 0; i < Pairs.length; i++ ) {
      var KeyVal = Pairs[i].split('=');
      if ( ! KeyVal || KeyVal.length != 2 ) continue;
      var key = unescape( KeyVal[0] );
      var val = unescape( KeyVal[1] );
      val = val.replace(/\+/g, ' ');
      Params[key] = val;
   }
   return Params;
}

createRequestObject = function() {
	var xmlhttp;
		/*@cc_on
	@if (@_jscript_version>= 5)
			try {xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
					try {xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");}
					catch (E) {xmlhttp = false;}
			}
	@else
		xmlhttp = false;
	@end @*/
	if (!xmlhttp && typeof XMLHttpRequest != "undefined") {
			try {xmlhttp = new XMLHttpRequest();} catch (e) {xmlhttp = false;}
	}
	return xmlhttp;
}

var http = createRequestObject();

function addEvent(obj, evType, fn){
 if (obj.addEventListener){
   obj.addEventListener(evType, fn, false);
   return true;
 } else if (obj.attachEvent){
   var r = obj.attachEvent("on"+evType, fn);
   return r;
 } else {
   return false;
 }
}
addEvent(window, 'load', init_ibox);