IE8 showModalDialog未在请求标头中设置referer

Question

我们正在编写一些javascript来覆盖方法window.open和window.showModalDialog，referer将在标题中设置。

if (isIE) {
    if (!window.__open) {
      window.__open = window.open;
      window.open = function (url, name, features) {
        this.__ESSecurity.alert("my window.open");
        var ww = window.__open("", name, features);
        ww.location.href = url;
        return ww;
      };
    }    

    if (!window.__showModalDialog) {
      window.__showModalDialog = window.showModalDialog;
      window.showModalDialog = function (url, obj, features) {
        this.__ESSecurity.alert("my window.showModalDialog");

        var Hfeatures = this.__ESSecurity.splitFeatures(features);
        var features = 'left=' + Hfeatures['dialogLeft'] + ',top='+ Hfeatures['dialogTop'];
        features+= ',width=' + Hfeatures['dialogWidth']  + ',height=' + Hfeatures['dialogHeight'];
        features+= ',toolbar=no,menubar=no,status=no,resizable=yes,modal=yes';
        var ww =  window.open(url, "name", features);
        return ww;
    };
}

} 它在FF和IE9中工作正常，但仅在IE8中方法showModalDialog没有通过引用。

你知道可能缺少什么吗？