function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<arguments.length; i+=2) {
			if (document.getElementById(arguments[i])) {
				document.getElementById(arguments[i]).src = arguments[i+1];
			}
		}
	}
}
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		index_03_over = newImage("images/index_03-over.gif");
		index_06_over = newImage("images/index_06-over.gif");
		index_07_over = newImage("images/index_07-over.gif");
		index_11_over = newImage("images/index_11-over.gif");
		index_12_over = newImage("images/index_12-over.gif");
		index_17_index_03_over = newImage("images/index_17-index_03_over.gif");
		preloadFlag = true;
	}
}