Trouble with some Scripting - Wont run :-( PLEASE HELP

Hi there, I am putting the following code into an item template, and rightly or wrongly, I am expecting it to search the current item and tell me how much stock is (available) at location (1).  Am I missing something major here, do I need to insert it somewhere differently, or add code to make it run?  At present it appears to do nothing, even looking at the source, I can see my code, but there are no results in it.....

function beforeSubmit(type)  {      var itemRecord = nlapiGetNewRecord()      var vitemId = itemRecord.getId();            var filters = new Array();      filters[filters.length] = new nlobjSearchFilter('internalid', null, 'anyof', vitemId, null)       filters[filters.length] = new nlobjSearchFilter('inventorylocation', null, 'anyof', 1, null)        var columns = new Array();      columns[columns.length] = new nlobjSearchColumn('inventorylocation',null,null);      columns[columns.length] = new nlobjSearchColumn('locationquantityavailable',null,null);              var searchresults = nlapiSearchRecord('item', null, filters, columns);      for ( var i=0; searchresults != null && i < searchresults.length; i++)      {      var searchresult = searchresults[i];          var vinventorylocation = searchresult.getValue('inventorylocation');      var vlocationquantityavailable = searchresult.getValue('locationquantityavailable');        // The v12:33pm is to make sure there is not a cached version of this *.js      nlapiLogExecution("Debug", "ItemLocation Values", "v12:33pm-" +           vinventorylocation +