ASP.NET

protected void Page_Load(object sender, EventArgs e)
    {
        if (IsPostBack)
            return;
//btnNewChore:the button that activates the modal dialog
//btnRefresh: the button that shld activate the gridView refreshing
        
btnNewChore.OnClientClick = "javascript:OpenChild( theURLOfTheChildForm, btnRefresh.ID)";
        
    }


 protected void btnRefresh_Click(object sender, EventArgs e)
    {
               gridViewChores.DataBind();
    }

function OpenChild(theURLOfTheChildForm,targetButton) 
    {
    
        var winSettings = "center:yes;resizable:no;dialogHeight:300px"
        var returnValue = window.showModalDialog(URL, "", winSettings );
      
            if (returnValue == null)
            {
              window.alert("NO chore was created!");
            }
            else
            {
             __doPostBack(btnName,'');
            }