onMouseOver in Anchor Tag

I understand that when applying html text to a textfield you can have an anchor tag call a specific function. My question, however, is if you can call a function on rollover of the anchor tag?

Example:

Instead of this…
<a href=‘asfunction:_root.test’>Click here to call the test function</a>

I’d like this…
<a href=’’ onMouseOver=‘asfunction:_root.test’>Rollover here to call the test function</a>

Thanks in advance!