// Vous pouvez changer la vitesse (speed)
var speed = 10; 
var timer = 0; 

function preload() 
{ 
        if (document.getElementById) 
        {
                document.getElementById('preloadIMG').style.visibility='hidden';
                opacity('preloader',100,0);
        }
        
        else 
        {
                if (document.layers) 
                {    
                        document.preloadIMG.visibility = 'hidden';
                     opacity('preloader',100,0);
                }
                else 
                {
                        document.all.preloadIMG.style.visibility = 'hidden';
                        opacity('preloader',100,0);
                }
        }
}

function opacity(id, opacityStart, opacityEnd) 
{ 
    for(i = opacityStart; i >= opacityEnd; i--) 
        { 
        setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
        timer++; 
    } 
} 

// Change l'opacité des fifférents navigateur
function changeOpac(opacity, id) { 
    var object = document.getElementById(id).style; 
    object.opacity = (opacity / 100); 
    object.MozOpacity = (opacity / 100); 
    object.KhtmlOpacity = (opacity / 100); 
    object.filter = "alpha(opacity=" + opacity + ")"; 
        
        if (opacity == 0)
        {
                document.getElementById('preloader').style.visibility='hidden';
        }
} 

window.onload = function() { preload();}

window.document.write("<style type=\"text/css\">#preloader { display: block !important; }</style>");