function Affiche(img)
{
var nPosX = (screen.width) ? (screen.width-document.images[0].width)/2 : 0;
var nPosY = (screen.height) ? (screen.height-document.images[0].height)/2 : 0;
w=open("",'image','width=400,height=400,top='+nPosX+',left='+nPosY+',toolbar=no,scrollbars=no,resizable=yes');
w.document.write("Cojay - Web Site");
w.document.write("