Why doesnt asp.net have a click event for check boxes?

I NEED a click event...

the click change event doesnt fire when i click a check box on my asp page...

Just like a button click i need a check box click..any suggestions...
I need to be able to click on a check mark and have it execute some code.

The code I want to run should be in the click event of this check box but I cannot find this check box event ?

Please advise...

Thanks,
Jon