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Liferay Portal has a JavaScript library that allows the creation of portletURLs inside your JavaScript code. Something like:

<input type="button" value="<liferay-ui:message key="cancel" />" 
onclick="<portlet:namespace/>_back();"/>
 
<script type="text/javascript">
 
      function <portlet:namespace/>_back() {
 
            var backURL = Liferay.PortletURL.createRenderURL();
            backURL.setPortletId("");
            backURL.setParameter("networkId", ${networkId});
            backURL.setPortletMode("view");
 
            location.href = backURL;
      }
 
</script>

All the available methods are (as in Liferay 5.2.3):

• setCopyCurrentRenderParameters: function(copyCurrentRenderParameters);
• setDoAsUserId: function(doAsUserId);
• setEncrypt: function(encrypt);
• setEscapeXML: function(escapeXML);
• setLifecycle: function(lifecycle);
• setName: function(name);
• setParameter: function(key, value);
• setPlid: function(plid);
• setPortletConfiguration: function(portletConfiguration);
• setPortletId: function(portletId);
• setPortletMode: function(portletMode);
• setResourceId: function(resourceId);
• setSecure: function(secure);
• setWindowState: function(windowState);
• toString: function();

And you can create any portlet URL:

• var actionURL = Liferay.PortletURL.createActionURL(); // (‘ACTION_PHASE’);
• var renderURL = Liferay.PortletURL.createRenderURL(); // (‘RENDER_PHASE’);
• var resourceURL = Liferay.PortletURL.createResourceURL(); // (‘RESOURCE_PHASE’);
• var permissionURL = Liferay.PortletURL.createPermissionURL(portletResource, modelResource, modelResourceDescription, resourcePrimKey);

Have a look at the library in

liferay-portal-src-5.2.3/portal-web/docroot/html/js/liferay/portlet_url.js

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