javascript - Getting issue while doing validation using jQuery with JSON call -

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i have 1 text box in view in mvc , have validate text box client side before submit.i'm using jquery validation following:

$("input[type='submit']").click(function () {             //validation @ client side             //------------------code 1-------------------             if ($("#txtname").val() == "") {                 alert("please enter name.");                 return false;             }             //------------------code 1-------------------             //------------------code 2-------------------             //call database validation             $.getjson("/producy/isexist?productname=toy", function (data) {                 if (data.isexists == "1") {                     alert("product exist.");                     return false;                 }             });             //------------------code 2-------------------          });

validation working code 1 not code 2 when click on submit message display "product exist" form posted wrote return false after alert message.why it's doing such type of behavior.

thanks.


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