function changeImage(imgId) {
    
    var pth = imgId.src;
    pth = pth.replace("_nonsel", "_sel");
    imgId.src = pth;

}


function init(imgUrl) {
    var url = window.location.pathname.toLowerCase();
    if (url.indexOf("home") != "-1")
        document.getElementById("img1").src = imgUrl + "btn_home_sel.png";
    else if (url.indexOf("dentist") != "-1")
        document.getElementById("img2").src = imgUrl + "btn_dentists_sel.png";
       
}