function updateDays(selectedName, selectedIndex)
{
	var reset = false;
	
	var selectedYear = findObj('birth_year').options[selectedIndex].value;

	var selectedMonth = findObj('birth_month').selectedIndex;

	if(selectedName == "birth_month") reset = true;
	
	if(selectedMonth > 0)
	{
		var daysSelectList = findObj('birth_day');
	
		switch(selectedMonth)
		{
			case 1:
			case 3:
			case 5:
			case 7:
			case 8:
			case 10:
			case 12:
				
				if(selectedName == "birth_month") var monthLength = 31;
				break;

			case 2:
				if(selectedYear > 0)
				{
					
					if((selectedYear % 4) == 0)
					{
						var monthLength = 29;
					} else {
						var monthLength = 28;
					}
				} else {
					var monthLength = 28;
				}
				
				reset = true;
				break

			default:

				if(selectedName == "birth_month") var monthLength = 30;
				break;

		}
		
		if(reset)
		{

			daysSelectList.options.length = 0;

			daysSelectList.options[0] = new Option("Day", "day");

			for (i=1; i <= monthLength; i++)
			{
				if(i < 10)
				{
					var selectName = "0" + i;
					var selectValue = "0" + i;
				} else {
					var selectName = i;
					var selectValue = i;
				}
				daysSelectList.options[i] = new Option("" + selectName + "", "" + selectValue +"")
			}
		}
	}
	
}

function findObj(n, d) { 
  var p,i,x;  
  
  if(!d) d=document; 
  
  if((p=n.indexOf("?"))>0&&parent.frames.length) 
  {
    d=parent.frames[n.substring(p+1)].document; 
    n=n.substring(0,p);
  }
  
  if(!(x=d[n])&&d.all) x=d.all[n]; 
  
  for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  
  if(!x && d.getElementById) x=d.getElementById(n); 
  
  return x;
}