//获取url参数
function QueryString(url, fieldName) {
    var urlString = url;
    if (urlString != null) {
        var typeQu = fieldName + "=";
        var urlEnd = urlString.toString().indexOf(typeQu);

        if (urlEnd != -1) {
            var paramsUrl = urlString.toString().substring(urlEnd + typeQu.length);
            var isEnd = paramsUrl.toString().indexOf('&');
            if (isEnd != -1) {
                return paramsUrl.toString().substring(0, isEnd);
            }
            else {
                return paramsUrl;
            }
        }
        else
            return null;
    }
    else
        return null;
}

String.prototype.trim = function() {
    return this.replace(/(^\s*)|(\s*$)/g, "");
}

function addFavorite() {
    if (document.all) {
        window.external.addFavorite('http://www.bjblx.cn', '北京通瑞联科技有限公司');
    }
    else if (window.sidebar) {
        window.sidebar.addPanel('北京通瑞联科技有限公司', 'http://www.bjblx.cn', "");
    }
}
function setHomepage() {
    if (document.all) {
        document.body.style.behavior = 'url(#default#homepage)';
        document.body.setHomePage('http://www.bjblx.cn');
    }
    else if (window.sidebar) {
        if (window.netscape) {
            try {
                netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
            }
            catch (e) {
                alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true");
            }
        }
        var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
        prefs.setCharPref('browser.startup.homepage', 'http://www.bjblx.cn');
    }
}