hello every one,
         I am new to learn J, there is a problem in the jhs demo1
I don't understand the last sentence in jdemo1.ijs


            JS=: 0 : 0 NB. javascript
            function ev_roll_click(){jsubmit();} // submit form - calls J 
ev_roll_click
            )


when  I delete this sentence , it run as well. it make me confused.

sorry for my poor english~~





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