couv = new Array;

couv[0] = 'skin/logo_moy/medi.gif'
num = 0

function ChangeImage()
	{
if (num == -1) { num = (couv.length-1)}
	if(document.getElementById)
		{
		document.getElementById("zone").innerHTML ='<img src="'+ couv[num] + '"> ';
		num = num-1 
}
setTimeout("ChangeImage()", 15000);
	}
window.onload = ChangeImage;