Working with custom records

Hi,

I have a script that does a search for a custom record based on a value of a custom field after a customer record has been created.
It used this value to lookup a custom record to see if it already exists.

Here is the code:

function CheckIfTHisCardNumberExists()
{
var currentRecord;

currentRecord = nlapiGetNewRecord();

var enteredcardno = currentRecord.getFieldValue('custrecord_linked_card_no');

var searchresults = nlapiSearchRecord('customrecord17', null, null, null);
var totalsize = searchresults.length;

for (var i = 0; i < totalsize; i ++)
{
 
  var searchresult = searchresults[i];

  var curcardnum   =  searchresult.getValue('custrecord_mship_mem_2');
alert("curcardnum is " + custrecord_mship_mem_2);

  if (curcardnum == enteredcardno)