jquery Validation on Enter key not working -

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when use submit button on form validated validation form run expected.
when use enter key instead of submit button validation not work properly.
form gets submitted out checking validation .

how can solve problem ?

$(function () {     /* varable declarataion..... */     var $pin = $("#pincode").attr("name");     var $params = {debug:false, rules:{}, messages:{}};     $params['invalidhandler'] = function(form, validator) {         jquery(document).scrollleft(300) ;         jquery(document).scrolltop(100);         var posx = jquery(document).clientwidth/2;         var posy = jquery(document).scrolltop()+(jquery(document).clientheight/2);         $("#dialog-confirm").dialog({             resizable: false,             height:180,             modal: true,             position:[posx,posy],             buttons: {                "ok": function() {                         $( ).dialog( "close" );                 }             }         });     };     $params['rules'][$pin] = {required:true, digits :true, maxlength:9, min:1};      $params['messages'][$pin] = {         required:"please enter pin code",         digits :"please enter valid pin",         maxlength:"pin code must less 10 digit",         min: "zero can not pin code"     };     $("#form1").validate($params); });


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