/*
	Lightbox JS: Fullsize Image Overlays 
	by Lokesh Dhakar - http://www.huddletogether.com

	For more information on this script, visit:
	http://huddletogether.com/projects/lightbox/

	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
	(basically, do anything you want, just leave my name and link)
	
	Table of Contents
	-----------------
	Configuration
	
	Functions
	- getPageScroll()
	- getPageSize()
	- pause()
	- showLightbox()
	- hideLightbox()
	- initLightbox()
	- addLoadEvent()
	
	Function Calls
	- addLoadEvent(initLightbox)

*/



//
// Configuration
//

// If you would like to use a loading image, point to it in the next line, otherwise leave as-is.
var loadingImage = 'Lightbox/loading.gif';	
var ocultar=false;

// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}



//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}




var objBody = document.getElementsByTagName("body").item(0);
	
	// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
	var objOverlay = document.createElement("div");
	objOverlay.setAttribute('id','overlayFrame');
	objOverlay.style.display = 'none';
	objOverlay.style.position = 'absolute';
	objOverlay.style.top = '0';
	objOverlay.style.left = '0';
	objOverlay.style.zIndex = '100';
 	objOverlay.style.width = '100%';
 	objBody.insertBefore(objOverlay, objBody.firstChild);
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	// preload and create loader image
	var imgPreloader = new Image();
	
	// if loader image found, create link to hide lightbox and create loadingimage
	
		var objLoadingImageLink = document.createElement("a");
		objLoadingImageLink.setAttribute('href','#');
		objLoadingImageLink.onclick = function () {hideLightbox(); return false;}
		objOverlay.appendChild(objLoadingImageLink);
		
		var objLoadingImage = document.createElement("img");
		objLoadingImage.src = loadingImage;
		objLoadingImage.setAttribute('id','loadingImage');
		objLoadingImage.style.position = 'absolute';
		objLoadingImage.style.zIndex = '150';
		objLoadingImageLink.appendChild(objLoadingImage);

		imgPreloader.onload=function(){};	//	clear onLoad, as IE will flip out w/animated gifs

	imgPreloader.src = loadingImage;

	// create lightbox div, same note about styles as above
	var objLightbox = document.createElement("div");
	objLightbox.setAttribute('id','lightboxFrameDiv');
	objLightbox.style.display = 'none';
	objLightbox.style.position = 'absolute';
	objLightbox.style.zIndex = '100';	
	objBody.insertBefore(objLightbox, objOverlay.nextSibling);
	
	//Creando el boton para Cerrar
	var btCerrar=document.createElement("input")
	btCerrar.setAttribute('id','Cerrar');
	btCerrar.type='button'
	btCerrar.alt="Cerrar"
	btCerrar.value='X'
	btCerrar.onclick = function () {hideLightbox(); return false;}
	objLightbox.appendChild(btCerrar)
	
	var Br=document.createElement("br")
	objLightbox.appendChild(Br)
	
	
	// create link
	var objLink = document.createElement("a");
	objLink.setAttribute('href','#');
	objLink.setAttribute('title','Click to close');
	objLink.onclick = function () {hideLightbox(); return false;}
	objLightbox.appendChild(objLink);
		
	
	
	// create Frame
	var objFrame = document.createElement("iframe");
	objFrame.setAttribute('id','lightboxFrame');
	objFrame.frameBorder=0
	objLink.appendChild(objFrame);

	
	// create caption
	var objCaption = document.createElement("div");
	objCaption.setAttribute('id','lightboxCaptionFrame');
	objCaption.style.display = 'none';
	objLightbox.appendChild(objCaption);
	


// showLightbox()
// Preloads images. Pleaces new image in lightbox then centers and displays.
//
function showFrame(Titulo, Direccion, Width, Height)
{
   	
   	ocultar=false;
   	
   	//Inicializando Elementos
    	
   //Ajustanmdo el Tamaņo del Frame
   objFrame.style.width=Width + 'px' 
   objFrame.style.height=Height + 'px'
    	
    
    objFrame.style.display='inline';  
    	 
    	
    var arrayPageSize = getPageSize();
    var arrayPageScroll = getPageScroll();
    
    // center loadingImage if it exists
    if (objLoadingImage) {
	    objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
	    objLoadingImage.style.left = (((arrayPageSize[0] - 40 - objLoadingImage.width) / 2) + 'px');
	}
		    
    // set height of Overlay to take up whole page and show
    objOverlay.style.height = ((arrayPageSize[1] + 100) + 'px');
    objOverlay.style.display = 'block';
    
    //Fecha para evitar cache	
    var date=new Date();
       
    //Esperando que cargue la pagina
    	
    	
    if (navigator.appVersion.indexOf("MSIE")!=-1){
       	objFrame.attachEvent('onload', carga);
	}
    else
	{   
        objFrame.onload= carga;
   	}
        
	objFrame.src = Direccion
	
    function carga()
    {
     
     //Si se esta ocultando no mostrar
     if(ocultar)
     {   
     return false;
     }
     
      objOverlay.style.display = 'block'
     
	    // center lightbox and make sure that the top and left values are not negative
	    // and the image placed outside the viewport
	    var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - Height) / 2);
	    var lightboxLeft = ((arrayPageSize[0] - 40 - Width) / 2);
    	
    	
    	
	   	objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
	    objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
    	
	    //ubicando el boton cerrar
	    btCerrar.style.marginLeft=(Width-40) + "px";
    
	    if(Titulo){
    		objCaption.style.display = 'block';
		    objCaption.style.width = Width + 'px';
		    objCaption.innerHTML =  Titulo;    			    						   
	    }    				 
        	objLightbox.style.display = 'block';	
        return false;    	
	}
}



//
// hideLightbox()
//
function hideLightbox()
{
	// get objects
	objOverlay = document.getElementById('overlayFrame');
	objLightbox = document.getElementById('lightboxFrameDiv');	

	// hide lightbox and overlay
	objOverlay.style.display = 'none';
	objLightbox.style.display = 'none';	
	
    objFrame=document.getElementById('lightboxFrame');
	ocultar=true;
	objFrame.src="";
					
}