function popa(str) {

        searchWin = window.open(str,'popa','scrollbars=yes,resizable=yes,width=510,height=400,status=no,location=no,toolbar=no');

}
function popb(str) {

        searchWin = window.open(str,'popb','scrollbars=no,resizable=yes,width=400,height=300,status=no,location=no,toolbar=no');

}