var submitcount=0;

function reset() {
document.emailform.name.value="";
document.emailform.email.value="";
document.emailform.address.value="";

}

function checkFields() {                    
if (                                    
     (document.emailform.name.value=="") ||
 (document.emailform.email.value=="")  ||
 (document.emailform.address.value==""))  
   {
   alert("Please fill in your Name, Email and a Contact Address.");
   return false;
   }

else 
   {
   if (submitcount == 0)
      {
      submitcount++;
      return true;
      }
   else 
      {
      alert("This form has already been submitted.");
      return false;
      }
   }
}

function zoom(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);
}