var submitcount=0;

function reset() {
document.callback.name.value="";
document.callback.phone.value="";
}

function checkFields() {                    

if (   	  	  	  	  	  	  	  	  	  	  	  
     (document.callback.name.value=="") ||
	 (document.callback.phone.value=="")     ||
     (document.callback.email.value==""))  
   {
   alert("יש להשלים שם-מלא, דואר-אלקטרוני או טלפון.");
   return false;
   }
else 
   {
   if (submitcount == 0)
      {
      submitcount++;
      return true;
      }
   else 
      {
      alert("This form has already been submitted.");
      return false;
      }
   }
}

function checkFields_Full() {                    
if (   	  	  	  	  	  	  	  	  	  	  	  
     (document.callback_full.FullName.value=="") ||
	 (document.callback_full.Telephone.value=="")     ||
     (document.callback_full.Email.value==""))  
   {
   alert("יש להשלים שם-מלא, דואר-אלקטרוני או טלפון.");
   return false;
   }

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