function init() {
    // Extract the site code from the query string
    var now = new Date();
    var ticks = now.getTime();
    var vars = window.location.search.split("&");
    var pair = vars[0].split("=");
    var SiteCode = pair[1];
    // Load the two images for the site
    img = document.getElementById("Graph1");
    img.setAttribute("src", "/upload/hydro/" + SiteCode + "_Rain7.gif?" + ticks);

    img = document.getElementById("Graph2");
    img.setAttribute("src", "/upload/hydro/" + SiteCode + "_Rain30.gif?" + ticks);

    // Next the data links
    anchor = document.getElementById("Data1");
    anchor.setAttribute("href", "/upload/hydro/" + SiteCode + "_Rain7.xml?" + ticks);

    anchor = document.getElementById("Data2");
    anchor.setAttribute("href", "/upload/hydro/" + SiteCode + "_Rain30.xml?" + ticks);
}

window.onload = init;