function openwin1(url) {
 w = window.open(url, 'win1','width=640,status=no,scrollbars=yes,directories=no,menubar=no,resizable=yes,toolbar=no');
}

function openwin2(url) {
 w = window.open(url, 'win2','width=640,status=no,scrollbars=yes,directories=no,menubar=no,resizable=yes,toolbar=no');
}

function openwin3(url) {
 w = window.open(url, 'win3','width=640,status=no,scrollbars=yes,directories=no,menubar=no,resizable=yes,toolbar=no');
}