Salut,
<script language="JavaScript1.1">
function pop(){
a = window.open("about:blank", "zz", "width=500,height=500");
a.document.write("<img src='"+nameday+"'>");
}
var now = new Date();
var day = now.getDay();
var nameday;
if (day == 0) nameday = "IMAGE_DU_DIMANCHE ";//dimanche
if (day == 1) nameday = "IMAGE_DU_LUNDI ";//lundi
if (day == 2) nameday = "IMAGE_DU_MARDI ";//mardi
if (day == 3) nameday = "IMAGE_DU_MERCREDI ";//mercredi
if (day == 4) nameday = "MAGE_DU_JEUDI ";//jeudi
if (day == 5) nameday = "IMAGE_DU_VENDREDI ";//vendredi
if (day == 6) nameday = "IMAGE_DU_SAMEDI ";//samedi
document.write("<font size=2 face='verdana,arial'>")
document.write("<img src='"+nameday+"' onclick='pop()'>")
window.document.images[0].width = 152;
window.document.images[0].height = 150;
</script>
@++