[ask]Script For Closing Sales Order

Every month we must to close sales order with partially fulfilled, so i try to use the script to close the SO and I try to deploy it in mass update, but always getting error.

Any one can help me ?

Function SetClose()  {  // Define variables  var n_icount = nlapiGetLineItemCount('item');  var n_linesclosed = 0;  var chklineclosed = false;    // Loop through line items  for (var i = 1; i <= n_icount; i++)  {  // Set focus on line  nlapiSelectLineItem('item',i);    // Check close status  chklineclosed = nlapiGetCurrentLineItemValue('item', 'isclosed');    // Increment counter for closed line items  if (chklineclosed == true)  {  n_linesclosed += 1;  }    // Check if counters match  if (n_count == n_linesclosed)    }  }