JavaScript: onFocus, onBlur

onfocus priešingas onblur

$(document).ready(function () {

            $('#txtHours').val("Hours");

        });

function onBlur() {

            if ($('#txtHours').val() == "") {

                $('#txtHours').val("Hours");

            };

        };

function onFocus() {

            if ($('#txtHours').val() == "Hours") {

                $('#txtHours').val("");

            };

        };

<asp:TextBox ID="txtHours" runat="server" Width="70px" AutoCompleteType="Disabled" Visible="false" onfocus="onFocus();" onblur="onBlur();"></asp:TextBox>