function IsEmpty(aTextField) {
	   if ((aTextField.value.length==0) ||
	   (aTextField.value==null)) {
	      return true;
	   }
		else { return false; }
	}
	
	function ValidateForm(form)
	{

	   if(IsEmpty(form.izena)) 
	   { 
	      form.izena.focus(); 
	      return false; 
	   } 
	 	   if(IsEmpty(form.izena2)) 
	   {
	      form.izena2.focus(); 
	      return false; 
	   } 	 
	 	   if(IsEmpty(form.email)) 
	   {
	      form.email.focus(); 
	      return false; 
	   }
	   if (IsEmpty(form.email2)) 
	   { 
	      form.email2.focus(); 
	      return false; 
	      }  
	return true;
	 
	}