//改变url的方法
function editUrl(url, parm, value) {
    var regStr = "/" + parm + "=[^&]*/g";

    if (eval(regStr).test(url)) {
        url = url.replace(eval(regStr), parm + "=" + escape(value));
    } else {
        if (url.indexOf("?") == -1) {
            url += "?" + parm + "=" + escape(value);
        } else {
            url += "&" + parm + "=" + escape(value);
        }
    }

    return url;
}

//取某个参数的值
function getUrlParasValue(url, paraName) {
    var urlPara = url;
    var reg = new RegExp("[&\?]" + paraName + "=([^&$]*)", "gi");
    var a = reg.test(urlPara);
    return a ? RegExp.$1 : "";
}

function getMenuName(url) {
    url = url.substring(url.indexOf("/") + 2, url.length);
    url = url.substring(url.indexOf("/") + 1, url.length);
    url = url.substring(0, url.indexOf("/"));
    return url;
}