javascript - Disabling enter key for form -

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i have been trying disable enter key on form. code have shown below. reason enter key still triggering submit. code in head section , seems correct other sources.

disableenterkey: function disableenterkey(e){         var key;               if(window.event)             key = window.event.keycode; //ie         else             key = e.which; //firefox                return (key != 13);     },

if use jquery, quite smiple. here go

$(document).keypress(     function(event){      if (event.which == '13') {         event.preventdefault();       }   });

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