[Greasemonkey] stopping body onload function

[Alf Eaton]

I'm trying to stop a function from being called by 'onload' - for  
example the 'LoadStart()' function on this page:
http://www.bbc.co.uk/radio/aod/networks/radio1/aod.shtml?radio1/ 
breezeblock

Is there an easy way to do this? I've tried a few different things,  
but haven't managed to either replace the function or change the  
onload call.

alf.