how to load another record to a form

dear UG ,

i am trying to load a record from another custom record unto a form so i can edit the record and make changes to the database from the form.

here is the code i used which does not return any errors although it does not do any changes

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<!-- script written by Enyioko Cosmos ocp oca,mcse,mcsa,mcp, GMNIM->



function beforeSubmit()
{

// run this script for existing records
//call the old record




// Get or load the existing record

var record = nlapiLoadRecord( 'customrecord_books_records', 19);


// Get the particular book record
// call the reference id of the book record