Autolook up form

Ok, I have an auto look up order form which i have built using various tutorials etc, the form works fine in mozilla, however in IE it is slow. the form can be viewed here: [login to view URL]~pestcont/autosearch/[login to view URL] if you type in any letter you will see a list of products, the problem is in firefox it is almost instant, but it lags in IE. I am looking for somebody who has the experience to resolve this for me and to get the form running quick enough in both browsers. Please note that only experienced programers with a good feedback will considered. I need this done as soon as possible. Thanks