// preload gifs
if (document.images) {
	var i;
	var imagesOn = new Array();
	for ( i=0 ; i<imageNames.length ; i++ ) {
		imagesOn[i] = new Image();
		imagesOn[i].src = (imagePrefix + imageNames[i] + imageOnSuffix);
				
	}
}

// rollover functions
function img_act(target) {
	if (document.images)
		document[target].src = (imagePrefix + target + imageOnSuffix);
}

function img_inact(target) {
	if (document.images)
		document[target].src = (imagePrefix + target + imageOffSuffix);
}