function setOptions(chosen, selbox) {
selbox.options.length = 0;
if (chosen == " ") {
selbox.options[selbox.options.length] = new Option('Please select one of the options above first',' ');
setTimeout(setOptions(' ',document.myform.quantity),5);
}
if ((chosen == "Sat Aug 8 - 7:30 pm") || (chosen == "Sun Aug 9 - 7:30 pm") || (chosen == "Fri Aug 14 - 7:30 pm") || (chosen == "Sat Aug 15 - 7:30 pm") == (chosen == "Sun Aug 16 - 2:00 pm Matinee") == (chosen == "Sun Aug 16 - 7:30 pm")) {
selbox.options[selbox.options.length] = new Option('Adults - $22.00 ','Adults');
selbox.options[selbox.options.length] = new Option('Seniors 55+ and Students w/ID - $18.00 ','Seniors / Students');
selbox.options[selbox.options.length] = new Option('Children 12 & Under - $16.00 ','Children 12 / Under');
selbox.options[selbox.options.length] = new Option('Groups of 10 or More - $16.00 Each','Groups 10 / More');
setTimeout(setOptions('Adults',document.myform.quantity),5);
}
if (chosen == "Mon Aug 10 - 7:30 pm") {
selbox.options[selbox.options.length] = new Option('Industry Night Only $10 Each ','Industry Night');
setTimeout(setOptions('Industry Night',document.myform.quantity),5);
}

if (chosen == "none") {
selbox.options[selbox.options.length] = new Option('Please select one of the options above first','none');
}


if ((chosen == "Adults") || (chosen == "Seniors / Students") || (chosen == "Children 12 / Under")) {
selbox.options[selbox.options.length] = new Option('1 ','1');
selbox.options[selbox.options.length] = new Option('2 ','2');
selbox.options[selbox.options.length] = new Option('3 ','3');
selbox.options[selbox.options.length] = new Option('4 ','4');
selbox.options[selbox.options.length] = new Option('5 ','5');
selbox.options[selbox.options.length] = new Option('6 ','6');
selbox.options[selbox.options.length] = new Option('7 ','7');
selbox.options[selbox.options.length] = new Option('8 ','8');
selbox.options[selbox.options.length] = new Option('9 ','9');
selbox.options[selbox.options.length] = new Option('10+ (Please Select "Groups" Above)','0');
}
if (chosen == "Industry Night") {
selbox.options[selbox.options.length] = new Option('1 ','1');
selbox.options[selbox.options.length] = new Option('2 ','2');
selbox.options[selbox.options.length] = new Option('3 ','3');
selbox.options[selbox.options.length] = new Option('4 ','4');
selbox.options[selbox.options.length] = new Option('5 ','5');
selbox.options[selbox.options.length] = new Option('6 ','6');
selbox.options[selbox.options.length] = new Option('7 ','7');
selbox.options[selbox.options.length] = new Option('8 ','8');
selbox.options[selbox.options.length] = new Option('9 ','9');
selbox.options[selbox.options.length] = new Option('10+ ','10');
}
if (chosen == "Groups 10 / More") {
selbox.options[selbox.options.length] = new Option('10 ','10');
selbox.options[selbox.options.length] = new Option('11 ','11');
selbox.options[selbox.options.length] = new Option('12 ','12');
selbox.options[selbox.options.length] = new Option('13 ','13');
selbox.options[selbox.options.length] = new Option('14 ','14');
selbox.options[selbox.options.length] = new Option('15 ','15');
selbox.options[selbox.options.length] = new Option('16 ','16');
selbox.options[selbox.options.length] = new Option('17 ','17');
selbox.options[selbox.options.length] = new Option('18 ','18');
selbox.options[selbox.options.length] = new Option('19 ','19');
selbox.options[selbox.options.length] = new Option('20 ','20');
selbox.options[selbox.options.length] = new Option('21 ','21');
selbox.options[selbox.options.length] = new Option('22 ','22');
selbox.options[selbox.options.length] = new Option('23 ','23');
selbox.options[selbox.options.length] = new Option('24 ','24');
selbox.options[selbox.options.length] = new Option('25 ','25');
selbox.options[selbox.options.length] = new Option('26 ','26');
selbox.options[selbox.options.length] = new Option('27 ','27');
selbox.options[selbox.options.length] = new Option('28 ','28');
selbox.options[selbox.options.length] = new Option('29 ','29');
selbox.options[selbox.options.length] = new Option('30 ','30');
selbox.options[selbox.options.length] = new Option('31 ','31');
selbox.options[selbox.options.length] = new Option('32 ','32');
selbox.options[selbox.options.length] = new Option('33 ','33');
selbox.options[selbox.options.length] = new Option('34 ','34');
selbox.options[selbox.options.length] = new Option('35 ','35');
selbox.options[selbox.options.length] = new Option('36 ','36');
selbox.options[selbox.options.length] = new Option('37 ','37');
selbox.options[selbox.options.length] = new Option('38 ','38');
selbox.options[selbox.options.length] = new Option('39 ','39');
selbox.options[selbox.options.length] = new Option('40+ ','40');
}
}

// Validate Form
function validate_form ( )
{
    valid = true;

    if ( (document.myform.os0.value == "none") && (document.myform.os1.value == "none") )
    {
        alert ( "Please select a Performance" );
        valid = false;
    }

    else if (document.myform.quantity.value == "0")
    {
        alert ( "Please select \"Groups of 10 or More\" under Ticket Type" );
        valid = false;
    } 

    return valid;
}