how to update the record of Selected row in Interactive Grid - Interactive Grid

how to update the record of Selected row in Interactive Grid , 

In Oracle Forms :- its very easy to achieve the below functionality with help of 

/*GO_BLOCK ('TEST');
First_record ;
While system.last_Record <> true  loop
    if :test.status ='Y' then 
    update statement 
    end if;
next_Record;
end loop;*/

Now see in APEX Interactive GRID

Create Update Button on GRID Region --> Create DA with JavaScript Code 

   var i, records, record, sal, model,
        view = apex.region("emp").widget().interactiveGrid("getCurrentView");
    if ( view.supports.edit ) { // make sure this is the editable view
       
    percent = percent / 100;
        model = view.model;
        records = view.getSelectedRecords();
 if ( records.length > 0 ) {
            for ( i = 0; i < records.length; i++ ) {
                record = records[i];
                sal = parseFloat(model.getValue(record, "SAL"));
             
                
                if ( !isNaN(sal) ) 
                {
                 sal = sal + sal * percent;
                 model.setValue(record, "SAL", "" + sal);
                 or
                 $s("SAL",sal);
                 or
                 apex.item("SAL").setValue(sal);
                 or
                  apex.server.process("testValidate",{x01: sal},
                }