/*changing banner images*/
function changeBanner(blk, imgPath) {

    var block1 = document.getElementById("block1");
    var block2 = document.getElementById("block2");
    var block3 = document.getElementById("block3");

    var img = document.getElementById("bannerImg");

    //alert(block1.className);

    block1.className = "tabnormal";
    block2.className = "tabnormal";
    block3.className = "tabnormal";
    document.getElementById(blk).className = "tabrollover";
    document.getElementById("bannerImg").src = imgPath;
}