function initLightbox()
{
    // Controlla se la pagina è in modalità di edit o in lettura
	if(document.forms['aspnetForm']['MSOLayout_InDesignMode'].value == 1)
	{
		myLightbox = document.getElementById('lightbox');
		myLightbox.style.position='relative';
		myLightbox.style.display='block';
	}
	else
	{
	    // Inserisce un div :
	    //
	    // <div id="overlay"></div>
	    //
	    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','overlay');
        // Imposta la visualizzazione del lightbox a seconda del browser
	    if(navigator.appName=="Microsoft Internet Explorer")
	    {
            // Questo testato con IE6 e IE7
            objOverlay.style.display = 'none';
            objOverlay.style.position = 'absolute';
            objOverlay.style.top = '0';
            objOverlay.style.left = '0';
            objOverlay.style.zIndex = '900';
            objOverlay.style.width = '100%';
 	    }
 	    else if(navigator.appName=="Netscape" || navigator.appName=="Opera")
 	    {
 	        //Questo funziona con FF2, FF3, Opera9.27, Safari 3.1.1 x Win
 	        objOverlay.setAttribute('style','display:none;position:absolute;top:0;left:0;width:100%;height:100%;z-index:900;background-color:#000;-moz-opacity: 0.8;opacity:.80;filter: alpha(opacity=80);');
 	    }
        // Aggiunge l'oggetto che dovrà poi scurire la pagina sottostante
	    objBody.insertBefore(objOverlay, objBody.firstChild);
    	// Aggiunge la chiamata alla funzione	
	    if (!document.getElementsByTagName){ return; }
	    var anchors = document.getElementsByTagName("a");
	    // loop through all anchor tags
	    for (var i=0; i<anchors.length; i++)
	    {
		    var anchor = anchors[i];

		    if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "splightbox"))
		    {
			    //anchor.onclick = function () {showLightbox(this); return false;}
			    anchor.onclick = function () {myBox(); return false;}
		    }
	    }
	}
}
// Richiama la funzione di init al caricamento della pagina
initLightbox();

//
// 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;
}

//
// hideLightbox()
//
function hideLightbox()
{
	// get objects
	objOverlay = document.getElementById('overlay');
	objLightbox = document.getElementById('lightbox');
	// hide lightbox and overlay
	objOverlay.style.display = 'none';
	objLightbox.style.display = 'none';
	// make select boxes visible
	selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}
	// disable keypress listener
	document.onkeypress = '';
}

function myBox()
{
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';

    var objContenitore = document.getElementById("contenitore");
    var objContW=objContenitore.style.width;
    var widthCont=objContW.substring(0,objContW.length-2);
    objLightbox.style.left=(arrayPageSize[0]-widthCont)/2;
	objLightbox.style.display='block';
	
	if (self.pageYOffset) {
		self.pageYOffset=0;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		document.documentElement.scrollTop=0;
	} else if (document.body) {// all other Explorers
		document.body.scrollTop=0;
	}
}