//************************************************************************************
// function popUp(sPicURL) {                                                         *
//      window.open( "popup.htm?"+sPicURL, "",  "resizable=1,HEIGHT=200,WIDTH=200"); *
// }                                                                                 *
//************************************************************************************
<!-- Begin
 function popUp(img){
   foto1= new Image();
   foto1.src=(img);
   Controlla(img);
 }
 function Controlla(img){
   if((foto1.width!=0)&&(foto1.height!=0)){
     viewFoto(img);
   }
   else{
     funzione="Controlla('"+img+"')";
     intervallo=setTimeout(funzione,20);
   }
 }
 function viewFoto(img){
   largh=foto1.width+20;
   altez=foto1.height+20;
   stringa="width="+largh+",height="+altez;
   finestra=window.open(img,"",stringa);
 }
 //  End -->