if (document.images) 
{  
img01on = new Image ;img01off = new Image;  
img02on = new Image ;img02off = new Image;
img03on = new Image ;img03off = new Image;
img04on = new Image ;img04off = new Image;
img11on = new Image ;img11off = new Image;
img12on = new Image ;img12off = new Image;
img13on = new Image ;img13off = new Image;

  
img01on.src = "images/but01o.gif";img01off.src = "images/but01.gif"; 
img02on.src = "images/but02o.gif";img02off.src = "images/but02.gif";
img03on.src = "images/but03o.gif";img03off.src = "images/but03.gif"; 
img04on.src = "images/but04o.gif";img04off.src = "images/but04.gif"; 
img11on.src = "images/but11o.gif";img11off.src = "images/but11.gif";
img12on.src = "images/but12o.gif";img12off.src = "images/but12.gif"; 
img13on.src = "images/but13o.gif";img13off.src = "images/but13.gif"; 

} 
function img_act(imgName) { 
if (document.images) 
{ imgOn = eval (imgName + "on.src"); 
document [imgName].src = imgOn; } } 
function img_inact(imgName) { 
if (document.images) 
{ imgOff = eval(imgName + "off.src"); 
document [imgName].src = imgOff; } } 

var isNS = (navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 4);
var HIDDEN = (isNS) ? 'hidden' : 'hidden';
var VISIBLE = (isNS) ? 'visible' : 'visible';

function ShowBox(name,type) {
	if(isNS) 
	b = document.getElementById(name); //eval("b = document."+name+";");
	else
	eval("b = "+name+";");
	b.style.visibility = type;
/*	if(b.style.visibility==HIDDEN)
    b.style.visibility=VISIBLE;
	else
    b.style.visibility=HIDDEN;*/
}