<!-- hide from old browsersvar imgID = new Array('class_logo','classmates','directory','links','memoriam','notes','officers','reunion','yale_shield');var navImgOn = new Array();var navImgOff = new Array();function cacheImages(){	for(i=0;i<imgID.length;i++){		var nam = imgID[i];		navImgOn[nam] = new Image;		navImgOn[nam].src = "images/"+nam+"_on.gif";		navImgOff[nam] = new Image;		navImgOff[nam].src = "images/"+nam+".gif";	}}function rollOn(nam){	document.images[nam].src=navImgOn[nam].src;	return true;}function rollOff(nam){	document.images[nam].src=navImgOff[nam].src;	return true;}//-->