var alertstringnumadultsninos='Please select at least 1 person';
var alertstringdate='Please select your date';
var alertstringschedule='Please select your schedule';
var alertstringlocation='Please select the location';

function validateform(thisform) {	
  if (thisform.ID_NUM==null || thisform.ID_NUM.value=='') {
   alert(alertstringlocation);
   return false;
  }
  if (thisform.NUMADULTS==null && thisform.NUMNINOS==null) {
   alert(alertstringnumadultsninos);
   return false;
  }
   if (thisform.NUMADULTS.value=='' && thisform.NUMNINOS.value=='') {
   alert(alertstringnumadultsninos);
   return false;
  }
  if (thisform.NUMADULTS.value=='0' && thisform.NUMNINOS.value=='0') {
   alert(alertstringnumadultsninos);
   return false;
  }
    if (thisform.NUMADULTS.value==0 && thisform.NUMNINOS.value==0) {
   alert(alertstringnumadultsninos);
   return false;
  }
  if (parseInt(thisform.NUMADULTS.value,10)<parseInt(thisform.NUMNINOS.value,10) && thisform.NAME.value!='DISS' && thisform.NAME.value!='ENCO') {
   alert('Each child must come with a paying adult for this program');
   return false;
  }
    
  if (thisform.FECHA==null || thisform.FECHA.value=='') {
   alert(alertstringdate);
   return false;
  }
  if (thisform.SCHEDULE==null || thisform.SCHEDULE.value=='' || thisform.SCHEDULE.value=='-- select --') {
   alert(alertstringschedule);
   return false;
  }	
  return true;
}