var preloadedhome1 = new Image();
    preloadedhome1.src="http://www.nerv.com.mx/images/home1.gif";
var preloadedhome2 = new Image();
    preloadedhome2.src="http://www.nerv.com.mx/images/home.gif";
var preloadednews1 = new Image();
    preloadednews1.src="http://www.nerv.com.mx/images/news1.gif";
var preloadednews2 = new Image();
    preloadednews2.src="http://www.nerv.com.mx/images/news.gif";
var preloadedmusic1 = new Image();
    preloadedmusic1.src="http://www.nerv.com.mx/images/music1.gif";
var preloadedmusic2 = new Image();
    preloadedmusic2.src="http://www.nerv.com.mx/images/music.gif";
var preloadedband1 = new Image();
    preloadedband1.src="http://www.nerv.com.mx/images/band1.gif";
var preloadedband2 = new Image();
    preloadedband2.src="http://www.nerv.com.mx/images/band.gif";
var preloadedshop1 = new Image();
    preloadedshop1.src="http://www.nerv.com.mx/images/shop1.gif";
var preloadedshop2 = new Image();
    preloadedshop2.src="http://www.nerv.com.mx/images/shop.gif";
var preloadedgigs1 = new Image();
    preloadedgigs1.src="http://www.nerv.com.mx/images/gigs1.gif";
var preloadedgigs2 = new Image();
    preloadedgigs2.src="http://www.nerv.com.mx/images/gigs.gif";
var preloadedlinks1 = new Image();
    preloadedlinks1.src="http://www.nerv.com.mx/images/links1.gif";
var preloadedlinks2 = new Image();
    preloadedlinks2.src="http://www.nerv.com.mx/images/links.gif";
var preloadedcontact1 = new Image();
    preloadedcontact1.src="http://www.nerv.com.mx/images/contact1.gif";
var preloadedcontact2 = new Image();
    preloadedcontact2.src="http://www.nerv.com.mx/images/contact.gif";

function switchhome(_onOff) {
if (_onOff=="on")
document.home.src=preloadedhome1.src; 
else
document.home.src=preloadedhome2.src;  
}
function switchband(_onOff) {
if (_onOff=="on")
document.band.src=preloadedband1.src; 
else
document.band.src=preloadedband2.src;
}
function switchnews(_onOff) {
if (_onOff=="on")
document.news.src=preloadednews1.src; 
else
document.news.src=preloadednews2.src;
}
function switchmusic(_onOff) {
if (_onOff=="on")
document.music.src=preloadedmusic1.src; 
else
document.music.src=preloadedmusic2.src;  
}
function switchgigs(_onOff) {
if (_onOff=="on")
document.gigs.src=preloadedgigs1.src; 
else
document.gigs.src=preloadedgigs2.src;
}
function switchshop(_onOff) {
if (_onOff=="on")
document.shop.src=preloadedshop1.src; 
else
document.shop.src=preloadedshop2.src;
}
function switchlinks(_onOff) {
if (_onOff=="on")
document.links.src=preloadedlinks1.src; 
else
document.links.src=preloadedlinks2.src;
}
function switchcontact(_onOff) {
if (_onOff=="on")
document.contact.src=preloadedcontact1.src; 
else
document.contact.src=preloadedcontact2.src;  
}
function open_flyer(arg) {
 window.open(arg,"flyer", "status=no,toolbar=no,location=no,scrollbars=yes,height=400,width=400,top=10,left=10");
 }