js anamation lag on Chrome

I have been putting a site together for the past couple of weeks which relies heavily on js. It scrolls horizontally and effects the background position upon scroll. This works smoothly in most browsers, although not in Chrome. I have noticed there is less of a lag if I resize my Chrome window to 25% of the size of my monitor. If anyone would have an idea why this might be occurring, please share. here: [url]http://springscript.com/jsSlide/[/url] Thanks in advance!

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