<!-- Popup minimale -->
function popup(l,h,url,title) {
	hauteur=Math.round((screen.availHeight-h)/2);
	largeur=Math.round((screen.availWidth-l)/2);
	window.open(url, title, "toolbar=0,location=0,directories=0,status=0,scrollbars=0,resizable=0,menubar=0,top="+hauteur+",left="+largeur+",width="+l+",height="+h);
}

<!-- Popup avec barres de défilement -->
function popup1(l,h,url,title) {
	hauteur=Math.round((screen.availHeight-h)/2);
	largeur=Math.round((screen.availWidth-l)/2);
	window.open(url, title, "toolbar=0,location=0,directories=0,status=0,scrollbars=1,resizable=0,menubar=0,top="+hauteur+",left="+largeur+",width="+l+",height="+h);
}