var target = "self"
function envoie(frm){
URL = frm.mgros.options[frm.mgros.selectedIndex].value
if (frm.mgros.selectedIndex != 0){
if (target == "blank") mywindow = window.open(''+URL+'');
else if (target == "self") document.location = URL;
else parent.frames[target].location = URL;
}}

function voirSelection(liste)
{
     var valeur = liste.options[liste.selectedIndex].value;
	 var lenom = liste.name;
	  
	 var $isbn = lenom;
	 var $taille = valeur;
	 return $isbn;
	 return $taille;
	 
}