Fix flicker of background images in IE

ie-fix-flicker.js

//==== Fix flicker of background images in IE 
//http://ajaxian.com/archives/no-more-ie6-background-flicker
//http://support.microsoft.com/?scid=kb;en-us;823727&spid=2073&sid=global
//http://www.adobe.com/cfusion/communityengine/index.cfm?event=showdetails&productId=1&postId=1104
//Executes proprietary command to force IE to cache all background images which prevents the browser from fetching the same image repeatedly when using CSS hover background repositioning

if($.browser.msie && parseInt($.browser.version) === 6) {
	try {
		document.execCommand("BackgroundImageCache",false,true);
	} catch(e) {
		// just in case
	}
}