Running an rjs function on page load

i am currently working on a function that adds markers to a map…

without getting into too much detail, the map is initially in a
display:none div… so, i had to do a few things to get it to show up
correctly…

initially, i needed to add markers when the user clicked a link. i did
this with a call to an rjs… this just pushed new markers onto the
page…

we now want to add these markers on page load…

is there a way i can fire this off once, after the page is loaded…
without any user intervention?