ajax - why is javascript validation not working? -

ajax - why is javascript validation not working? -

i using next code validate user data:

'#calculate' : { onclick : function(evt) { evt.preventdefault(); var errorcode = 0; if(document.getelementbyid('zip').value == ''){ dojo.query("#zipvalidate").addclass("error"); errorcode = 1; dojo.place('<div class="icon"></div>',dojo.byid('zip'),'after'); } else { dojo.query("#zipvalidate").removeclass("error"); errorcode = 0; } if(errorcode == 0) { validation passed , phone call ajax } } }

but if validation fails, still goes ajax call.

i tried removing global errorcode too, still have same issue.

javascript ajax dojo