function openRadWindow (windowid, url)
    {
    //Getting rad window manager
    var oManager = GetRadWindowManager();
    
    //Success. Getting existing window DialogWindow using GetWindowByName
    var oWnd = oManager.GetWindowByName(windowid);
    
    oWnd.SetUrl(url);    
    oWnd.Show();

    var screenHeight = 570;  
    var screenWidth = document.body.offsetWidth; 
    var windowHeight = oWnd.GetHeight();
    var windowWidth = oWnd.GetWidth();

    var TopPosition = (screenHeight/2) - (windowHeight/2);
    var LeftPosition = (screenWidth/2) - (windowWidth/2);
    
    if(TopPosition < 30)
    {
    TopPosition = 30;
    }
    
    oWnd.MoveTo(LeftPosition, TopPosition-15);
    
    }