function winop(url)
{
 x = window.screen.width;
 x1 = (x-650)/2;
 y1 = (window.screen.height-650)/2;
windop = window.open(url, "name","toolbar=no,directories=no,menubar=no,status=no,resizable=yes,scrollbars=yes,height=650,width=650,left="+x1+",top="+y1);
}

function longwinop(url)
{
 x = window.screen.width;
 x1 = (x-280)/2;
 y1 = (window.screen.height-840)/2;
longwindop = window.open(url, "name", "toolbar=no,directories=no,menubar=no,status=no,resizable=yes,scrollbars=yes,height=840,width=280,left="+x1+",top="+y1);
}