cached=0;

if (document.images){

gallery_on = new Image()
gallery_on.src = "images/gallery_on.gif";
gallery_off = new Image()
gallery_off.src = "images/gallery_off.gif";

photographs_on = new Image()
photographs_on.src = "images/photographs_on.gif";
photographs_off = new Image()
photographs_off.src = "images/photographs_off.gif";

exhibitions_on = new Image()
exhibitions_on.src = "images/exhibitions_on.gif";
exhibitions_off = new Image()
exhibitions_off.src = "images/exhibitions_off.gif";

information_on = new Image()
information_on.src = "images/information_on.gif";
information_off = new Image()
information_off.src = "images/information_off.gif";

contact_on = new Image()
contact_on.src = "images/contact_on.gif";
contact_off = new Image()
contact_off.src = "images/contact_off.gif";



cached=1;
}

function lineon(imgName) {
        if (cached==1) {
	lineOn = eval(imgName + "_on.src");
	document [imgName].src= lineOn;
	}
}

function lineoff(imgName) {
        if (cached==1) {
  	lineOff = eval(imgName + "_off.src");
	document [imgName].src= lineOff;
	self.status='';
	}
}