function checkAge()
{
	/* the minumum age you want to allow in */
	var min_age = 18;

	/* get values */
	var year = parseInt(document.getElementById("year").value);
	var month = parseInt(document.getElementById("month").value) - 1;
	var day = parseInt(document.getElementById("day").value);

	var theirDate = new Date((year + min_age), month, day);
	var today = new Date;

	if ( (today.getTime() - theirDate.getTime()) < 0) {
		alert("You are too young to enter this site!");
		return false;
	}
	else {
		return true;
	}
}

function populeDays(element)
{
	for(var i = 1; i <= 31; i++)
	{
		element.options[i-1] = new Option(i,i);	
	}
}


function populeMonths(element)
{
	for(var i = 1; i <= 12; i++)
	{
		element.options[i-1] = new Option(i,i);	
	}
}


function populeYears(element)
{
	var total = 90;
	var date = new Date();
	var year = date.getFullYear();

	for(var i = 1; i <= total; i++)
	{
		element.options[i-1] = new Option(year + 1 - i,year + 1 - i);	
	}
}