var NowFrame = 1;
var MaxFrame = 2;
var bStart = 0;
function fnToggle() {
var next = NowFrame + 1;
if(next == MaxFrame+1) 
{
NowFrame = MaxFrame;
next = 1;
}
if(bStart == 0)
{
bStart = 1;  
setTimeout('fnToggle()', 1000);
return;
}
else
{
oTransContainer.filters[0].Apply();
document.images['oDIV'+next].style.display = "";
document.images['oDIV'+NowFrame].style.display = "none"; 
oTransContainer.filters[0].Play(duration=2);
if(NowFrame == MaxFrame) 
NowFrame = 1;
else
NowFrame++;
} setTimeout('fnToggle()', 6000);
}
fnToggle();

function g(o){
return document.getElementById(o);
} 
function navh(n){ 
//如果有N个标签,就将i<=N; 
//本功能非常OK,兼容IE7,FF,IE6; 
for(var i=1;i<=3;i++){
g('nava_'+i).className='nav-off';
g('navb_0'+i).className='undis';
}
g('navb_0'+n).className='dis';
g('nava_'+n).className='nav-on'; 
}