the problem I'm facing is this:

• I have a textbox for a date range along side a calendar control.


• When the user selects a date from the calendar, it fills that date into the textbox


• When this happens I want to fire a javascript function, however, the 'onchange' event doesn't seem to happen.

I'd ideally like to be able to add the event as an attribute to the textbox, something like:

txtCreateDate.Attributes.Add(onchange, string.Format(JSfunction({0},'{1}');, arg1, arg2));

more info:
The date is entered into the textbox in c#. The calendar control has an eventhandler on the page. When a date is selected, the eventhandler puts the date into the textbox. I have tried setting the focus to the textbox at this point, then putting an onBlur attribute on the textbox, but the textbox never seems to get focus.

I suppose I could directly call the javascript function at this point doing ClientScript.RegisterClientScriptBlock or something like that, but that seems sloppy and never works like I want it to.