function ActiveMenu(menuId, className, NoActiveClass) {
    isBreak = 0;
    var pageNames = ["index", "About", "Pro", "News", "Case", "Down", "Tech", "Contact", "WebSite"]
    var fileList = [".html", ".aspx", ".asp"]


    var obj = document.getElementById(menuId).getElementsByTagName("A");

    //设置默认为不活动
    for (var i = 0; i < obj.length; i++) {
        obj[i].className = NoActiveClass;
    }


    var loc = window.location + "";
    
    
    
    //转换小写
    loc = loc.toLowerCase();
    for (var i = 0; i < pageNames.length; i++) {
        pageNames[i] = pageNames[i].toLowerCase();
    }
    for (var i = 0; i < fileList.length; i++) {
        fileList[i]= fileList[i].toLowerCase();
    }
    
    



    //查找url中各种后缀名
    var idx = -1;
    for (var i = 0; i < fileList.length; i++) {
        idx = loc.lastIndexOf(fileList[i]);
        if (idx != -1) {
            break;
        }
    }

    loc = loc.substring(0, idx);

    for (j = 0; j < pageNames.length; j++) {
        idx = loc.indexOf(pageNames[j]);
        
        if (idx != -1) {
            for (var i = 0; i < obj.length; i++) {

                var href = obj[i].href + "";
                href = href.toLowerCase();

                idx = href.indexOf(pageNames[j]);

                if (idx != -1) {
                    obj[i].className = className;
                    break;
                }

            }
            break;
        }

    }


}



ActiveMenu("Menu", "sel", "");