Line Init function

Hi,

I'm trying to set default value for Location in the line items using the script below. During testing I noticed that the function didn't fire before the first line item is added to the the sublist. Instead it fired after the 'Add' button is clicked. However, this function worked for the succeeding line items.

Is this how Line Init function behaves?

   function lineInit(type) {         //get value of Location line item field       var lineLocationValue = nlapiGetCurrentLineItemValue(type, 'location');         //check if location in the line item has a value, if not default to the       //value of location (main tab).      if (lineLocationValue == null || lineLocationValue == '') {            var locationValue = nlapiGetFieldValue('location');            if (locationValue != null || locationValue != '') {                   nlapiSetCurrentLineItemValue(type, 'location',                  locationValue, false, false);                        }          }     }