function pop(url)
{
var winleft = (screen.width - 491) / 2;
var winUp = (screen.height - 343) / 2;
window.open(url,'POP','toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=no,copyhistory=no,scrollbars=no,width=491,height=343,left='+winleft+',top='+winUp+'');
}
function ci(img)
{
ONCLICK=main.src='images/port/'+img+'';
}