// sfrollover
 

if(document.images) {
  
	var postcardson = new Image();  
	var postcardsoff = new Image();
	var videoon = new Image(); 
	var videooff = new Image();
	var techon = new Image(); 
	var techoff = new Image();
	var coasteron = new Image(); 
	var coasteroff = new Image();
	
	postcardson.src = "images/sf_postcards_on.gif";  
	postcardsoff.src = "images/sf_postcards_off.gif";
	videoon.src = "images/sf_video_on.gif";  
	videooff.src = "images/sf_video_off.gif";
	techon.src = "images/sf_tech_on.gif";  
	techoff.src = "images/sf_tech_off.gif";
	coasteron.src = "images/sf_coaster_on.gif";  
	coasteroff.src = "images/sf_coaster_off.gif";	
}


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

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