$(document).ready(function() {
    var powerby = document.getElementById("powerby");
    var powerstr = '制作单位：<a href="http://www.aspxadmin.com/" title="阅速CMS" target="blank">Aspxadmin.com</a>';
    var powerstr2 = '制作单位：<a title=阅速CMS href="http://www.aspxadmin.com/" target=blank>Aspxadmin.com</a>';
    if (powerby == null) {
        showpower();
    }
    else if (powerby.innerHTML.toLowerCase() != powerstr.toLowerCase() && powerby.innerHTML.toLowerCase() != powerstr2.toLowerCase()) {
        showpower();
    }
    function showpower() {
        var div = document.createElement("div");
        div.innerHTML = powerstr;
        document.body.appendChild(div);
    }
});