function setProductSortOrder(fieldName) {
  if (fieldName == document.filter_form.order_by.value) {
    document.filter_form.order_dir.value = (document.filter_form.order_dir.value == "ASC") ? "DESC" : "ASC";
  } else {
    document.filter_form.order_by.value = fieldName;
    document.filter_form.order_dir.value = "ASC";
  }
  document.filter_form.submit();
}


function trimString(s){
    s = s.replace(/(^\s*)|(\s*$)/,"");
    return s; 
}
function checkEmail(s){
if (s.search(/^[^\s]+@[^\s]+$/)  == -1){ 
  return false;
}
else {
return true;
}
}
function openWindow(url, windowName, width, height) 
 {
                window.open(url,windowName,'toolbar=no,location=no,directories=no,menubar=no,resizable=no,copyhistory=no,scrollbars=yes,width='+width+',height='+height);
 }