infoImg_on = new Image();
infoImg_on.src = "images/info_on.jpg";
infoImg_off = new Image();
infoImg_off.src = "images/info_off.jpg";

imagesImg_on = new Image();
imagesImg_on.src = "images/images_on.jpg";
imagesImg_off = new Image();
imagesImg_off.src = "images/images_off.jpg";

linksImg_on = new Image();
linksImg_on.src = "images/links_on.jpg";
linksImg_off = new Image();
linksImg_off.src = "images/links_off.jpg";

feedbackImg_on = new Image();
feedbackImg_on.src = "images/feedback_on.jpg";
feedbackImg_off = new Image();
feedbackImg_off.src = "images/feedback_off.jpg";


subInfoImg_on = new Image();
subInfoImg_on.src = "images/sub_info_on.gif";
subInfoImg_off = new Image();
subInfoImg_off.src = "images/sub_info_off.gif";

subImagesImg_on = new Image();
subImagesImg_on.src = "images/sub_images_on.gif";
subImagesImg_off = new Image();
subImagesImg_off.src = "images/sub_images_off.gif";

subLinksImg_on = new Image();
subLinksImg_on.src = "images/sub_links_on.gif";
subLinksImg_off = new Image();
subLinksImg_off.src = "images/sub_links_off.gif";

subFeedbackImg_on = new Image();
subFeedbackImg_on.src = "images/sub_feedback_on.gif";
subFeedbackImg_off = new Image();
subFeedbackImg_off.src = "images/sub_feedback_off.gif";


function rollOn(imgName) {
	if(document.images) {
	    imgOn = eval(imgName + '_on.src');
	    document[imgName].src = imgOn;
	}
}

function rollOff(imgName) {
	if(document.images) {
	    imgOff = eval(imgName + '_off.src');
	    document[imgName].src = imgOff;
	}
}