function getCurrDir(hrefstr) {   
    var currDir = hrefstr.toString().split('/');
    return currDir[3];
}
function setMainPage() {
    if($('#main_nav').length) {
        var currURL = new RegExp(getCurrDir(document.location));
        var linkHREF = $('#main_nav li a');
        for (var i=0; i<linkHREF.length; i++) {
            var testHRF = getCurrDir(linkHREF[i]);
               //alert(testHRF + ' vs ' + currURL);
            var result = currURL.test(testHRF);
               //alert(result);
            if(result) {
                //alert('Link number: ' + i + ', Full link:' + linkHREF[i].parentNode);
                linkHREF[i].parentNode.className = 'selected';
            } else {
                //alert('foobar');
            }
        }            
       } else {
           //alert('foobar');
       }
}



function extractPageName(hrefString)
{
    var arr = hrefString.split('/');
    return  (arr.length<2) ? hrefString : arr[arr.length-2].toLowerCase() + arr[arr.length-1].toLowerCase();               
}

function setActiveMenu(arr, crtPage)
{
    for (var i=0; i<arr.length; i++)
    {
        if(extractPageName(arr[i].href) == crtPage)
        {
            if (arr[i].parentNode.tagName != "DIV")
            {
                //arr[i].className = "current";
                arr[i].parentNode.className = "selected";
            }
        }
    }
}

function setPage()
{
    hrefString = document.location.href ? document.location.href : document.location;
    //alert(hrefString);
    if (document.getElementById("left_nav")!=null)
        setActiveMenu(document.getElementById("left_nav").getElementsByTagName("a"), extractPageName(hrefString));
}