function cnvImg (nom,imatge) {
   grafic = new Object();
   grafic = nom;
   grafic.src = imatge;
}
function genFormulari() {
   open('/eng/formulari.html','Ajuda','menubar=no,toolbar=no,directories=no,location=no,status=no,copyhistory=no,scrollbars=no,width=625,height=400,'+'screenX='+(screen.availWidth-625)/2+',screenY='+(screen.availHeight-400)/2);
}