function randomHeaderImage() {
    var headerImages=new Array();
    headerImages[0]="/e107_themes/WECT/images/header/photos/FD_2011_01.jpg";
    headerImages[1]="/e107_themes/WECT/images/header/photos/FD_2011_02.jpg";
    headerImages[2]="/e107_themes/WECT/images/header/photos/FD_2011_03.jpg";
    headerImages[3]="/e107_themes/WECT/images/header/photos/FD_2011_04.jpg";
    headerImages[4]="/e107_themes/WECT/images/header/photos/FD_2011_05.jpg";
    headerImages[5]="/e107_themes/WECT/images/header/photos/FD_2011_06.jpg";
    headerImages[6]="/e107_themes/WECT/images/header/photos/FD_2011_07.jpg";
    headerImages[7]="/e107_themes/WECT/images/header/photos/we1ct.jpg";
    headerImages[8]="/e107_themes/WECT/images/header/photos/Workshop_2011.jpg";

    var element = document.getElementById("header");
    element.style.backgroundImage = "url('" + headerImages[Math.floor(Math.random() * headerImages.length)] + "')";
}