function SetCookie(name,value)//两个参数，一个是cookie的名子，一个是值
{
    var Days = 1; //此 cookie 将被保存 1 天
    var exp  = new Date();    //new Date("December 31, 9998");
    exp.setTime(exp.getTime() + Days*24*60*60*1000);
    document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}
function getCookie(name)//取cookies函数        
{
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
     if(arr != null) return unescape(arr[2]); return null;

}

function OpenWin(){
    if(getCookie("sdWin") == null){
        SetCookie("sdWin","sdWin");
        window.open("http://ads.sdchina.com/stat/stat.aspx?id=1&ret=http%3a%2f%2fshop.10010.com%2fWebSource.jsp%3fCBICode%3d100104%26PFICode%3d21%26PFBICode%3d21004%26DestUrl%3dhttp%3a%2f%2fshop.10010.com%2fnumber%2fsearchNumber.action","_blank");
    }
}

window.attachEvent("onunload",OpenWin);