$("#nav ul li a").each(function(){
    var strhtml = $(this).attr("href")
    var postfix = strhtml.substr(strhtml.length-5);
    if(postfix == ".aspx")
    {
          var href = $(this).attr("href") + "?m=" + $(this).parent().parent().attr("id").replace("ChildMenu","");
    }
    $(this).attr("href", href);
});
var menuPara = getUrlParameter("m");
if (menuPara != null){
    DoMenu("ChildMenu" + menuPara);
}

//主页菜单显示
var LastLeftID = "";
if (menuPara != null){
    LastLeftID = "ChildMenu" + menuPara;
}
function DoMenu(emid) 
{ 
    var obj = $("#" + emid);
    if (obj.attr("className").toLowerCase() == "expanded"){
        obj.attr("className", "collapsed");
    }
    else {
        obj.attr("className", "expanded");
    }
    
    //关闭上一个菜单
    if(LastLeftID != "" && emid != LastLeftID) {
        $("#" + LastLeftID).attr("className", "collapsed"); 
    } 
    LastLeftID = emid; 
}

//得到Url参数
function getUrlParameter(asName){
    try{
        var lsURL=window.location.href;
        loU = lsURL.split("?");
        
        if (loU.length>1){
            var loallPm = loU[1].split("&");
            for (var i=0; i<loallPm.length; i++){
                var loPm = loallPm[i].split("=");
                if (loPm[0]==asName){
                    if (loPm.length>1){
                     return loPm[1];
                    }
                    else{
                     return "";
                    }
                }
            }
        }
        return null;
    }
    catch(err)
    {
        displayErrorMsg("getUrlParameter", err);
    } 
}