Handle sessiontimeout in DOJO Dialog

Here is sample code to handle sessiontimeout in dojo dialog for websphere portal environment
In case on user's session is invalidated.. user will be directed to login screen.

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<portlet:namespace/>checkUserSession("/wps/myportal","<portlet:resourceURL id="showSearchResult"/>");

function <portlet:namespace/>checkUserSession(checkSessionURL,dialogURL){
        window.dialogURL=dialogURL;
        dojo.xhrGet({url:checkSessionURL, preventCache:true, handleAs:"text", timeout:5000, load:<portlet:namespace/>isSessionActive, error:<portlet:namespace/>isSessionActive});
    }

function <portlet:namespace/>isSessionActive(response,ioArgs) {
        if(ioArgs.xhr.getResponseHeader('Content-Location').indexOf("/wps/portal")!=-1 || ioArgs.xhr.status!=200) {
            window.location.href=ioArgs.xhr.getResponseHeader('Content-Location');
        } else {
            dijit.byId('clientFinderSearchResults').attr("href",window.dialogURL);
            dijit.byId('clientFinderSearchResults').show();
        }
    }

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