FADEIN EFFET DE FONDU, ANIMATION D'OPACITE TOUT EN JAVASCRIPT

function FadeIn(id,millisec){
	var obj = getReferenceToDiv(id);
	changeOpac(0,obj);
	var timer = 0;
	var speed = Math.round(millisec / 100);
	var o = 0;
	for(var a=0;a<100;a++){
		setTimeout(function(){changeOpac(o,obj);o++;},(timer*speed))
			timer++;
		}
}
	
function FadeOut(id,millisec){
	var obj = getReferenceToDiv(id);
	changeOpac(100,obj);
	var timer = 0;
	var speed = Math.round(millisec / 100);
	var o = 100;
	for(var a=0;a<100;a++){
		setTimeout(function(){changeOpac(o,obj);o--;},(timer*speed))
			timer++;
		}
}



function getReferenceToDiv(divId,oDoc)
	{
	if(document.getElementById)
		{return document.getElementById(divId);}
	if(document.all)
		{return document.all[divId];}
	if(!oDoc)
		{oDoc = document;}
	if(document.layers)
		{
		if(oDoc.layers[divId])
			{return oDoc.layers[divId];}
		else{
			for( var x = 0, y; !y && x < oDoc.layers.length; x++)
				{
					y = getReferenceToDiv(divId,oDov.layers[x].document);
					return y;
				}
			}
		}
	return false;
}


function changeOpac(opacity, object) {
    if(object.style){object = object.style;}
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";}