Opening Radwindow with Javascript and passing multiple querystring parameters to target page

[KevinMc]

I am sure i just have a syntax error but i have been playing with this for over an hour and still can't figure it out. I have a page that opens a rad window from a javascript function and passes 2 querystring arguments as parameters. 

Here is the javascript to open the window:

<script type="text/javascript">

        function openEditorWindow(forumID, typeofPost)
        {
            var oReadingWnd = radopen("PostEditor.aspx?ForumID=" + forumID + "&PostType=" + typeofPost);
            oReadingWnd.Center();
        }
    </script>

Here is the code-behind to set the buttons onclick event.

 lnkNewThread1.Attributes.Add("onclick", "javascript:openEditorWindow('" + this.Request.QueryString["ForumID"] + ", " + PostType.NewThread.ToString() + "')");

Here is the button that is supposed to launch the window.

<asp:HyperLink runat="server" ID="lnkNewThread1" NavigateUrl="#" ImageUrl="~/Images/forum_new_thread.png"
                        Text="Start New Topic"/>

When i load the page and click the link i get an exception that querystring format is invalid. When i inspect the querystring the javascript function is appending to the radwindow open call is looks like this:

?ForumID=1%2cNewThread&PostType=undefined

Obviously the javascript function is treating the parameters passed from the onclick event as a single string but i have no idea at this point how to format that onclick so that the javascript function grabs both variables. I found a million examples passing just a single parameter from onclick to a javascript function but can't seem to find any that pass two or more.

[KevinMc]

Well as usual waling away for a few hours clears the head. The attributes.add in the code-behind needed to add quotes around each parameter being passed instead of arounf the whole string being passed so it should look like:

lnkNewThread1.Attributes.Add("onclick", "javascript:openEditorWindow('" + this.Request.QueryString["ForumID"] + "', '" + PostType.NewThread.ToString() + "')");