Dim sb As New System.Text.StringBuilder()
sb.Append(“if (typeof(Page_ClientValidate) == ‘function’) { “)
sb.Append(“if (Page_ClientValidate() == false) { return false; }} “)
sb.Append(“this.value = ‘Please Wait…’;”)
sb.Append(“this.disabled = true;”)
sb.Append(Me.Page.GetPostBackEventReference(Me.btnSubmit))
sb.Append(“;”)
btnSubmit.Attributes.Add(“onclick”, sb.ToString())