function showQuestionBox() {
    
    var questionURL = "/_wallControl/" +
        "_submitQuestion" + 
        ".aspx";        
    
    // prepare the modal window...this is the window that welcomes users to the 
    // view classes page.
    var popString = questionURL + "?" + 
        "height=300&width=350&modal=false&KeepThis=true&TB_iframe=true";
    
  //pop the window
    var modalWindow = tb_show("", 
        popString, 
        "");    

}