function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

var baseImgURL = 'jpgs/';

function rollover(image, over) {
	if (document.images && (preloadFlag == true)) {
		var overStr = "";
		if(over)
		{
		  overStr = "_over";
		}
		
		document[image].src = baseImgURL + image + overStr + '.jpg';
	    
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		newImage(baseImgURL + "aboutus_over.jpg");
		newImage(baseImgURL + "energy_over.jpg");
		newImage(baseImgURL + "home_over.jpg");
		newImage(baseImgURL + "service_over.jpg");
		newImage(baseImgURL + "spas_over.jpg");
		newImage(baseImgURL + "stoves_over.jpg");
		preloadFlag = true;
	}
}