function newwin3()
{
sub = window.open("http://www.sanyoan.com/html/rentacar.htm","window1","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=740,height=520");
x = (screen.width  - 470) / 2;
y = (screen.height - 450) / 2;
sub.moveTo(x,y);
}