Changing asp.net Label text in JQuery -

i have label , want change value jquery. new value assigned label , changed default value automatically. means new value lost post on button. when alert message displayed, new value assigned label, on clicking on alert msg, default value again restored. below code.

       $(document).ready(function () {             $("#btnsave").click(function () {                 var value = $("#txtname").val().trim();                 if (value == '') {                      $('#<%=hfisvalid.clientid %>').html("false");               //    $('#<%=hfisvalid.clientid %>').text("false");               //    $('#hfisvalid%>').text("false");               //  above 3 statements works simailarly                     alert('name requried');               // here when alert comes new value displayed, after clicking ok on               // alert message, default value restored again.                    return;                 }             });         }); 

thanks in advance...

when you're doing postback, you're assigning default values once again in page_load() etc.

try to, instead of

return;

add

return false;

this prevent normal button onclick() behaviour courses postback