function clignotte(time){
	if (pop.style.visibility == "hidden"){
		pop.style.visibility = "";
	} else {
		pop.style.visibility = "hidden";
	}
	if (time > 0){
		setTimeout('clignotte(' + (time*1-1000) + ');', 1000);
	} else {
		pop.style.visibility = "hidden";
	}
}
var pop = document.getElementById('panneau');
pop.style.left = Math.round((document.body.clientWidth - pop.offsetWidth) / 2) + document.body.scrollLeft;
pop.style.top = Math.round((document.body.clientHeight - pop.offsetHeight) / 2) + document.body.scrollTop;
//pop.style.left = pop.style.top = 10; 
pop.style.visibility = '';
clignotte(6000);