I have a textbox that I want to attach an "onchange" event to (via codebehind at some point, such as prerender). But I want to make sure if there is an existing onchange event, I do not overwrite that one.
It seems that MyTextBox.Attributes.Add(...) simply overwrites the existing event. I did find how to do this properly via JavaScript, here: http://v3.thewatchmakerproject.com/journal/168/javascript-the-dom-addeventlistener-and-attachevent
Is there any way to accomplish that, or even somehow call the JavaScript, such that I don't lose my previous onchange event?
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