function imagePreload(ss,sr){
	var bgstyle;
	if(navigator.appName == "Netscape") bgstyle = document.styleSheets[ss].cssRules[sr].style.backgroundImage;
	else if(navigator.appName == "Microsoft Internet Explorer") bgstyle = document.styleSheets[ss].rules[sr].style.backgroundImage;
	if(bgstyle){
	bgstyle = bgstyle.replace(/url\(/g,"").replace(/\)/g,"");
	var oBgPreload = new Image();
	oBgPreload.src = bgstyle;
	}
}