Unable to create friendly url mapping with javascript in Liferay

I've set up friendly URL routing for my Liferay portlet, and it's working fine when I generate URLs with the standard JSP tags like so: <portlet:renderURL var="resetUrl">     <portlet:param name="start" value="5" /> </portlet:renderURL> which, given my mapping, produces a lovely URL like: localhost:8080/web/guest/welcome/-/myportlet/5 But when I generate URLs using the JavaScript PortletURL module, I get the full unfriendly URL. For instance: var filterUrl = Liferay.PortletURL.createRenderURL(); filterUrl.setPortletId("<%= portletDisplay.getId() %>"); filterUrl.setParameter("start", "5"); location.href = filterUrl; will generate localhost:8080/web/guest/welcome?p_p_id=myportlet_WAR_MyPortletportlet&p_p_lifecycle=0&myportlet_WAR_MyPortletportlet_start=5 So the question is: How can I generate friendly URLs from JavaScript? Solution : Here is the Hack - Just give it a try <portlet:renderURL var="resetUrl">     <portlet:param name="start" value="changeStart" /> </portlet:renderURL> then write javascript and replace param values like this - function createStart(copyNavigationPointURL) {     var start = document.getElementById("navigationPointId").value;     copyNavigationPointURL = copyNavigationPointURL.replace(/changeStart/i,start);     submitForm(document.hrefFm, copyNavigationPointURL); } And you have your friendly url .... localhost:8080/web/guest/welcome/-/myportlet/5 Your are just done, Try & Enjoy the function.....:)