<script type="text/javascript"> function BindControlEvents() { //jQuery is wrapped in BindEvents function so it can be re-bound after each callback. //Your code would replace the following line: $('#<%= TextProtocolDrugInstructions.ClientID %>').limit('100', '#charsLeft_Instructions'); } //Initial bind $(document).ready(function () { BindControlEvents(); }); //Re-bind for callbacks var prm = Sys.WebForms.PageRequestManager.getInstance(); prm.add_endRequest(function() { BindControlEvents(); }); </script>