在Web浏览器控件中抓取Cookie - WP7

private void WebBrowser_LoadCompleted(object sender, System.Windows.Navigation.NavigationEventArgs e)
{
    string getCookieScript = "function getCookie(cname) { var name = cname + '='; var decodedCookie = decodeURIComponent(document.cookie); var ca = decodedCookie.split(';'); for(var i = 0; i <ca.length; i++) { var c = ca[i]; while (c.charAt(0) == ' ') { c = c.substring(1); } if (c.indexOf(name) == 0) { return c.substring(name.length, c.length); } } return ''; } getCookie('cookieName');";
    WebBrowser webBrowser = sender as WebBrowser;
    webBrowser.InvokeScript("eval", getCookieScript);
}