op=0; 
var op_plus = 1; 
var op_moins = 0;
var inter1;

function f_opacity(){

	if (op < 0.95 && op_plus)
		op+=0.05;
	else
		clearInterval(inter1);

	if (document.all){
		document.getElementById("footer1").style.filter="alpha(opacity=" + 100 * op +")";
		document.getElementById("footer2").style.filter="alpha(opacity=" + 100 * op +")";
		document.getElementById("footer3").style.filter="alpha(opacity=" + 100 * op +")";
		document.getElementById("ligne").style.filter="alpha(opacity=" + 100 * op +")";
		document.getElementById("anim_trad").style.filter="alpha(opacity=" + 100 * op +")";
		document.getElementById("entete").style.filter="alpha(opacity=" + 100 * op +")";
		document.getElementById("infos_footer").style.filter="alpha(opacity=" + 100 * op +")";
		document.getElementById("wndo").style.filter="alpha(opacity=" + 100 * op +")";
		
		document.getElementById("up").style.filter="alpha(opacity=" + 100 * op +")";
		document.getElementById("dn").style.filter="alpha(opacity=" + 100 * op +")";
		document.getElementById("bg").style.filter="alpha(opacity=" + 100 * op +")";
	}else{
		document.getElementById("footer1").style.opacity=op;
		document.getElementById("footer2").style.opacity=op;
		document.getElementById("footer3").style.opacity=op;
		document.getElementById("ligne").style.opacity=op;
		document.getElementById("anim_trad").style.opacity=op;
		document.getElementById("entete").style.opacity=op;
		document.getElementById("infos_footer").style.opacity=op;
		document.getElementById("wndo").style.opacity=op;
		
		document.getElementById("up").style.opacity=op;
		document.getElementById("dn").style.opacity=op;
		document.getElementById("bg").style.opacity=op;
	}

}

function lancerOpacite(){
	
	inter1 = setInterval("f_opacity()",150);	
	
}
setTimeout("lancerOpacite()",100);