[support] l() function and javascript function

how can i insert javascript functions in diferent events on my link created with l() function???

i have this

l($picture, "blog/$row->uid", array('title' => t('View user profile.'))

this create a html code like this

<a href="?q=blog/1" title="View user profile."><img src="http://URL_DOMAIN/files/avatar_selection/batman_1.jpg" alt="username&#039;s profile" title="username&#039;s profile" /></a>

and i need add some events...

<a href="?q=blog/1" title="View user profile."

onclick="get_show('+SOME_VAR+')" onmouseout="usercardget_hide()" >

<img src="http://URL_DOMAIN/files/avatar_selection/batman_1.jpg" alt="username&#039;s profile" title="username&#039;s profile" /></a>

how can do this???

thks in advanced