//create_element.js, ufo.js should be included already 
function loadBanner(banner, href) {
    //alert("loadBanner called " + banner + " " + href);
    var ext = getUrlQueryVariable(banner, 'ext');
    if ((ext == '.gif') || (ext == '.jpg') || (ext == '.jpeg')) {
        loadImageBanner(banner, href);
    } else {
        loadHtmlBanner(banner, href);
    } 
}
function getUrlQueryVariable(url, variable) {
    var url_segs = url.split("?");
    var query = url_segs[1];
    var vars = query.split("&");
    for (var i=0;i<vars.length;i++) {
        var pair = vars[i].split("=");
        if (pair[0] == variable) {
            return pair[1];
        }
    }
}
function loadImageBanner(banner, href) {
    var ad_node = "<a href=\""+href+"\" target=\"_blank\"><img src=\""+banner+"\"></a>";
    var banner_node = document.getElementById("adunit"); 
    banner_node.innerHTML = ad_node;
    
}
function loadHtmlBanner(banner, href) {
    var ad_node= "<iframe width=\"728\" height=\"90\" frameborder=\"0\" scrolling=\"no\" marginwidth=\"0\" marginheight=\"0\" src=\""+banner+"\"></iframe>";
    var banner_node = document.getElementById("adunit");
    banner_node.innerHTML = ad_node;
}