here are additional images for your references.........
and below is the code snippet that I am using in this case:
function BS_ValidateDuplication(type)
{
if(type == 'xedit')
nlapiLogExecution('debug', 'beforeSubmit', type);
}
function AS_ShowInactives(type)
{
if(type == 'xedit')
nlapiLogExecution('debug', 'afterSubmit', type);
}