update panel javascript file function after postback is not working

i got the solution reference your javascript file within scriptmanager
add following mandatory lines to execute jquery functions after updatepanel
asynchronous postback



mandatory lines are

C#

Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequest);

bind endrequest function after updatepanel asynchrous postback
function EndRequest() {
init();
}



add functions on document initialization

function init() {
$('#btn1').click(function () {
alert($('#txt').val());
});
}


$(document).ready(init);