function tabSelected(num) {
    var tIm = document.getElementById("hmTab");
    tIm.src = "images/hmTab" + num + ".jpg";
    var con1 = document.getElementById("tabContent1");
    var con2 = document.getElementById("tabContent2");
    var con3 = document.getElementById("tabContent3");
    con1.style.display = "none";
    con2.style.display = "none";
    con3.style.display = "none";
    switch (num) {
        case 1:
            con1.style.display = "";
            break;
        case 2:
            con2.style.display = "";
            break;
        case 3:
            con3.style.display = "";
            break;
    }
}