function ValSearch() {
  var errorflag;
   var errormsg;
  if (document.forms['search'].product.value =="" && document.forms['search'].company.value =="") {
 errorflag = 1;
 errormsg ="please enter a product or company name to search.\n";
  }
  if (document.forms['search'].postloc.value =="" &&  errorflag != 1) {
 errorflag = 1;
 errormsg = "please also supply a location to search.\n";
  } 
 if (errorflag == 1) {
 alert(errormsg);
  return false;
 } 
 }