// <![CDATA[

function changeLanguage() {
    var lnk = window.location.href;

    if (lnk.toLowerCase().indexOf('/ar') != -1) {
        window.location.href = lnk.replace('/ar', '/en');
    }
    else {
        window.location.href = lnk.replace('/en', '/ar');
    }
}
// ]]>