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<changeImages.arguments.length; i+=2) {
                         document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
                 }
         }
 }

 var preloadFlag = false;
 function preloadImages() {
	if (document.images) {
		buttons2_01_over = newImage("images/buttons2_01_over.gif");
		buttons2_02_over = newImage("images/buttons2_02_over.gif");
		buttons2_03_over = newImage("images/buttons2_03_over.gif");
		buttons2_04_over = newImage("images/buttons2_04_over.gif");
		buttons2_05_over = newImage("images/buttons2_05_over.gif");
		buttons2_06_over = newImage("images/buttons2_06_over.gif");
		buttons2_07_over = newImage("images/buttons2_07_over.gif");
		preloadFlag = true;
	}
}