function preload(aBaseDir, aImgArray) {

	var baseDIR = aBaseDir;
	var targetImgArray = aImgArray;
	var cacheImg = new Array();
	var i = 0;
	if (navigator.appVersion.charAt(0) >= "3") {
		for(i=0;i < targetImgArray.length;i++) {
			cacheImg[i] = new Image();
			cacheImg[i].src = baseDIR + targetImgArray[i];
		}
	}
}

function rollover(aImageName, aFilename) {

	var imgName  = aImageName;
	var imgFname = aFilename;
	var baseDIR  = gRolloverBaseDIR;
	if (navigator.appVersion.charAt(0) >= "3" && document.images) {
		document.images[imgName].src = baseDIR + imgFname;
	}
}