function popup640x480() {
window.open("", "popup640x480", "width=640,height=480,left=0, top=0, resizable=yes,status=yes,scrollbars=yes,toolbar=yes,location=yes, menubar=yes" );
}

function popup480x420() {
window.open("", "popup480x420", "width=480,height=420,left=0, top=0, resizable=yes,status=yes,scrollbars=yes,toolbar=yes,location=yes, menubar=yes" );
}

function popup480x420_nofx() {
window.open("", "popup480x420_nofx", "width=490,height=420,left=0, top=0, resizable=yes,status=no,scrollbars=yes,toolbar=no,location=no, menubar=no" );
}

function sitesatoz() {
window.open("", "sitesatoz", "width=390,height=300,left=0, top=0, resizable=yes,status=YES,scrollbars=yes,toolbar=NO,location=NO, menubar=NO" );
}

function membership() {
window.open("", "membership", "width=500,height=300,left=0, top=0, resizable=yes,status=yes,scrollbars=yes,toolbar=NO,location=NO, menubar=NO" );
}