function initZoom(){
	var arrayPageSize = getPageSize();
	if(isIE()){
		document.getElementById('voilNoir').style.height = document.documentElement.scrollHeight;
	}else{
		document.getElementById('voilNoir').style.height = arrayPageSize[1]+'px';
	}
	document.getElementById('voilNoir').onclick = function(){
		zoomNone();
	}
}

function isIE(){ return (/MSIE/).test(navigator.userAgent)}

function getPageSize(){
	var xScroll, yScroll;
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		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
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			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 = xScroll;		
	} else {
		pageWidth = windowWidth;
	}
	//console.log("pageWidth " + pageWidth)
	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

function zoomNone(){
	document.getElementById('voilNoir').style.display = 'none';
	document.getElementById('ZoomMCont').style.display = 'none';
}

function popup(url,winnom, largeur, hauteur){
	if(largeur > window.screen.availWidth){largeur = window.screen.availWidth-150}
	if(hauteur > window.screen.availHeight){hauteur = window.screen.availHeight-150}
	window.open(url, winnom, "width="+largeur+",height="+hauteur);
}