more dynamic selects

Ok, so I'm about to pull my hair out here. How in the world do you change the content of the select box, I have an array of Option()s, so I would assume that you could do

document.form.select.options=myoptionarray;

however, this gives me the error
"Error: setting a property that has only a getter" (this is in firefox btw, don't know what IE says about it). So is there a trick I'm missing?? Should I just make a whole new select object and replace it??

nevermind, I found out the problem