function NavAn(num)
{
    if(document.images)
        eval('document.images["nav0'+num+'"].src='+'nav[num].src');
}
function NavAus(num)
{
    if(document.images) 
       eval('document.images["nav0'+num+'"].src='+'nav0[num].src');
}

function NavsubAn(num)
{
    if(document.images)
        eval('document.images["navsub0'+num+'"].src='+'navsub[num].src');
}
function NavsubAus(num)
{
    if(document.images) 
       eval('document.images["navsub0'+num+'"].src='+'navsub0[num].src');
}