function navChange(n,c)
{
for(i=1;i<=8;i++)
{
document.getElementById("nav"+i).className="nav_none";
document.getElementById("navc"+i).style.display="none";
}
document.getElementById(n).className="nav_hover";
document.getElementById(c).style.display="block";
}

function car(h)
{
   for(i=1;i<=4;i++)
   {document.getElementById("pt"+i).className="tn"+i;}
   document.getElementById(h).className=h;
}
function carClick(c)
{
    for(i=1;i<=2;i++)
   {document.getElementById("pc"+i).style.display="none";}
   document.getElementById(c).style.display="block";
}



var n=0;
function tt()
{
n++;
if(n==3) 
{ n=1;}
document.getElementById("ff1").className="tfs"+n;
setTimeout("tt()",5000);
}