function setDay(month){
  var t=new Date();
  var d= document.signupForm.Day;
  var y= document.signupForm.Year;
  var x;
  var ardays = new Array();
  d.options.length=0;
  y.options.length=0;

  for (x=0;x<=12;x++){
       switch(x){
          case 4: case 6: case 9: case 11:
            ardays[x]= 30;
            break;
          case 2:
            ardays[x]= 29;
            break;
          default:
            ardays[x]= 31;
            break;
       }
  }
   for (i=1;i<=ardays[month];i++){
       d.options[d.options.length]=new Option(i,i);
   }
   for (j=1;j<100;j++){
       y.options[y.options.length]=new Option(t.getFullYear()-j,t.getFullYear()-j);
   }
}

function getAge(month, day, year){
	if (month == 'default') {
		alert('Please enter a month');
		return false;
	}else{
		var month = parseInt(month);
	}
	
   	var day= parseInt(day);
   	var year= parseInt(year);
   	var t=new Date();
   	var x=month+'/'+day+'/'+year;
   	var bday= new Date(x);
   	var age=t.getFullYear() - bday.getFullYear();
   	var comp= new Date(x);
   	var birthday= bday.toDateString();

   	if (comp.setFullYear(year + age) > t){
      		age--;
   	}
	
	
	
	
	
	return age;
}