Is there a faster way to empty a HTML Select box?

I have an HTML Select box with about 1800+ options. In my javascript I have the following line to empty the select box so I can repopulate it.

box.options.length = 0; 

In Firefox this runs fairly quickly, but IE takes a couple of seconds. 开发者_如何学运维Is there a faster way to do this in IE?

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At some point I have worked around IE's dismal performance in this area by enclosing list object in a div and then when I needed to reset it I would just set innerHTML of that div to a brand new empty list html tag. I'm sketchy on the details but I think that's what I did and it worked.
Please don't tell anybody I suggested this to you.

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One way that should be faster is to create a new select box with the same properties (but no options, of course), and replace the existing box with it.

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You could use box.innerHTML="". In my test, it is 68% faster:

http://jsperf.com/emptying-a-select-box/4.

Update: in 2015 box.innerHTML = "" is by multiple orders of magnitude the slowest option. :-) Use box.options.length = 0 instead.