function product_jump(form, op, publicDir) {
  var url;
  if (op == undefined) {
    alert('exception');
  } else if (op == 'productJump') {
    if (form.productJump == undefined || form.productJump.value == '') {
      return;
    }
    var pid = form.productJump.value;
    url = publicDir + "product/itemDetail?pid=" + pid;
    location.href = url;
  } else if (op == 'msdsJump') {
    if (form.msdsJump == undefined || form.msdsJump.value == '') {
      return;
    }
    var filePath = form.msdsJump.value;
    url = publicDir + "data/" + filePath;
    window.open(url);
	urchinTracker(url);
  }

  return false;
}