javascript use <option> from <select> as control, help!

[frey]

i tried to create a dropdown menu and use the option as a control to
change content inside another text area

the code is like this:

<select name="xxxx"><option onclick="changeunitprice(29.87)"
value="1744"/>

the function changeunitprice() is called when an option is selected

problem is it works well with firefox but not IE

any ideas? or is there anyway can make same effect in IE?

thanks