Bind Events Handler to parent and propagate to Child Elements

Bind Events Handler to parent and propagate to Child Elements

I have an jquery element like this
$(<td><input type=radio/><label /></td>)

I add a click event handle to the td and if I click on the radio button, it works.
click on the label, doesn't work.
click on space which is not the radio button and not the label, it works.

so what is the right way to make sure all children will trigger the save event handler?