Hi Venkat.
I'm not quite sure, what exactly you want to achieve.
If the change order is displayed in edit mode
the initial (stored in the DB) values are displayed in the correponding input fields.
If you are intersted in those values the same approach as before can be used.
var changetype_sym= "$args.chgtype.sym";
var category_sym="$args.category.sym";
But of course this approach doesn't work if you are intersted in the values, when the user has changed (edited) the category or changetype.
The most easy way would be to ask the DOM, because the data you are looking for is already available, instead of doing an additional webengine call.
While the category is a normal text input field which should be accessible by
var category_sym=document.getElementsByName("KEY.category")[0].value;
the change type field is a dropdown, which is a bit more complicate
var changetype_el=document.getElementsByName("SET.chgtype")[0]
var changetype_idx=changetype_el.selectedIndex;
var changetype_sym=changetype_el.options[changetype_idx].value;
* not tested *
Hope this helps.
Regards
.............Michael