Set value in Label as it is typed in TextBox using JavaScript

hi,

i found this javascript on forum, this is working fine.

the only problem is that its assign the label value to textbox when i press tab or click outside the textbox after typing. i want to assign texbox value to label while i am typing in textbox real time...

please advice

Enter Text :</b>&nbsp;   <asp:TextBox ID="TextBox1" runat="server"  onchange="ChangeLabel(this);" /><br />
   <b> Entered Text:</b>&nbsp;   <asp:Label ID="lblText" runat="server" /> 
    <script type="text/javascript">
        function ChangeLabel(obj) {
            document.getElementById("<%=lblText.ClientID%>").innerHTML = obj.value;
        }
    </script>