How to remove or overwrite a built in eventhandler from an Ajax Toolkit Control?

Hello community,

I am searching for a way to remove a specific built in eventhandler from an Ajax Control like the ComboBox.

I've created an own WebControl which adds a AjaxControlToolkit.ComboBox to it.

I then configure my control clientside with some jQuery code inside of an MyComboBox.js file for my control class (just like the controls inside the AjaxControlToolkit are created).

Let's say I want to remove the jQuery eventhandler onBlur() for the nested textBox control because I want to rewrite it on my own.

As far as I could discover it works well for whole controls built into the ComboBox.

For example:

$clearHandlers(this._myComboBox.get_textBoxControl());

works fine and removes all handlers from the textBox control built into the Ajax ComboBox.

But what if I want to remove only one single eventhandler?

I already tried:

$removeHandler(this._myComboBox.get_textBoxControl(), 'blur', this._myComboBox._textBoxBlurHandler);$removeHandler(this._myComboBox.get_textBoxControl(), 'blur', this._myComboBox._onTextBoxBlur);
this._myComboBox.get_events().removeHandler('blur', this._myComboBox._textBoxBlurHandler);

But nothing worked yet.

Has anyone done that before?

Is it possible at all?

Many thanks for your help.

Cheers