function contactDialog(URL,nom,l,h) {
	hauteur = Math.round((screen.availHeight-h)/2);
    largeur = Math.round((screen.availWidth-l)/2);
	URL=encodeURI(URL);
	popWin=window.open(URL, nom, "resizable=no,scrollbars=no, height="+ h +",width="+ l  + ",top="+hauteur+",left="+largeur);
	popWin.name="infoWin";
	popWin.document.close();
}