function on1() 
{if (!document.images) return; document.a.src = "images/butt_home_sel.gif";} 
function on2() 
{if (!document.images) return; document.b.src = "images/butt_calcio5_sel.gif";}
function on3() 
{if (!document.images) return; document.c.src = "images/butt_tornei_sel.gif";}
function on4() 
{if (!document.images) return; document.d.src = "images/butt_news_sel.gif";}
function on5() 
{if (!document.images) return; document.e.src = "images/butt_contact_sel.gif";}
function on6() 
{if (!document.images) return; document.f.src = "images/logo6_sel.GIF";}

function off1() 
{if (!document.images) return; document.a.src = "images/butt_home.gif";}
function off2() 
{if (!document.images) return; document.b.src = "images/butt_calcio5.gif";}
function off3() 
{if (!document.images) return; document.c.src = "images/butt_tornei.gif";}
function off4() 
{if (!document.images) return; document.d.src = "images/butt_news.gif";}
function off5() 
{if (!document.images) return; document.e.src = "images/butt_contact.gif";}
function off6() 
{if (!document.images) return; document.f.src = "images/logo6.GIF";}

var imgslist = new Array(
"images/butt_home_sel.gif",
"images/butt_calcio5_sel.gif",
"images/butt_tornei_sel.gif",
"images/butt_news_sel.gif",
"images/butt_contact_sel.gif",
"images/logo6_sel.GIF"); 

var imgs=new Array(); 
for (x=0; x<imgslist.length; x++) 
 if (document.images) 
  {imgs[x]=new Image(); imgs[x].src = imgslist[x];}