You are right that I was missing the # sign in front. Thank you!

But now the code works but not exactly as I wanted. The Alert() is called only when I click somewhere outside the textbox. I thought that the Alert() should click just as I start typing.

>In the jQuery code, replace txtMyTextbox with #ClientID
>
>>Actually in my code it is different syntax that uses the "ClientID" syntax. But UT would not let me type it. Here is how I name the control in my script, but where you see a dollar sign it is actually a percent sign.
>>
>>

>>"<$=txtMyTextbox.ClientID $>"
>>

>>
>>
>>>My guess is that txtMyTextbox should be #txtMyTextbox.
>>>
>>>>I am trying to incorporate a jQuery Change function in an asp.net page that would make certain control invisible when user starts typing (making changes) in a text box. My initial test, just to call an alert() does not seem to work. Here is my code:
>>>>
>>>>

>>>><script type="text/javascript">
>>>>       $(document).ready(function () {
>>>>
>>>>           $("txtMyTextbox").change(function () {
>>>>
>>>>               alert("Change Function Called");
>>>>
>>>>           });
>>>>
>>>>   })
>>>></script>
>>>>

>>>>
>>>>What is wrong with my code? TIA