Thanks much Sime Vidas, it worked! Since mine is an aspx with an AJAX UpdatePanel, jQuery(document).ready(function(){...}); did not work for me. So I implented it in the pageLoad as below:
jQuery.noConflict(); function pageLoad() { jQuery("#CollapseExpandTd").click(function() { jQuery("#TreeviewTd").toggle(); jQuery("#MenuBarTd").toggle(); }); } Thanks again!