how to reload a page using javascript with out alert

In parent page:

protected void Page_Load(object sender, EventArgs e)
    {
        this.ClientScript.GetPostBackEventReference(this, string.Empty);

        if (this.IsPostBack)
        {
            string eventTarget = (this.Request["__EVENTTARGET"] == null) ? string.Empty : this.Request["__EVENTTARGET"];

            if (eventTarget == "ChildWindowPostBack")
            {
              //update work goes here
            } 
}

In child page:

ClientScript.RegisterStartupScript(this.GetType(), "msg", "window.close();window.opener.__doPostBack('ChildWindowPostBack', '');", true);