//获取地址栏传递过来的参数
function GetParamByUrl(name)
{
    var URLParams = new Array();
    var aParams = document.location.search.substr(1).split('&');
    for (i=0; i<aParams.length;i++){
     var aParam = aParams[i].split('=');
     URLParams[aParam[0]] = aParam[1];
    }
    return URLParams[name];
}