function makeDoubleDelegate(function1, function2) {
        return function() {
            if (function1)
                function1();
            if (function2)
                function2();
        }
}

function chgeLogo() {
        var imgs=document.getElementsByTagName("img");
        var imgTag = document.createElement("img");
        imgTag.setAttribute("src","https://<%= @vhost_name %>/plugin/simple-theme-plugin/title.png");
        imgTag.setAttribute("style", "vertical-align: middle;padding-left: 0.75em;");
        imgs[0].parentNode.appendChild(imgTag);
        var spanTag = document.createElement("span");
        spanTag.id="heading_text";
        spanTag.innerHTML="Jenkins CI";
        imgs[0].parentNode.appendChild(spanTag);
}

window.onload = makeDoubleDelegate(window.onload, chgeLogo);