// Check the INFANT Birthday
// 2 Year Old Check

function checkBirthday(obj)
 {
	if( !/^(\d{1,2})\/(\d{1,2})\/(\d{4})$/.test(obj.value) ) {
		alert( "Invalid date supplied - must be format DD/MM/YYYY" );
		//obj.focus();
		return;
	}
	
	var d = new Date();
	var d2 = new Date(RegExp.$3, RegExp.$2, RegExp.$1);
	
	var diff = d.getDiff(d2, "y")
	if( isNaN(diff) ) {
		alert( "Invalid date supplied" );
	}
	else if( diff < 2 ) {
		alert( "This IS an INFANT \n they are younger that 2" );
		infant = true;
		document.form.submit();
		
	}
	else if( diff > 2 ) {
		alert( "This is NOT an INFANT \n they are older that 2" );
		infant = false;
		document.form.birthday.value = "";
		document.form.date.focus();
	}
	
}


<form name="form" action="abc.htm">
INF:<select name="date"
onChange="document.form.birthday.value=document.form.birthday.value+document.form.date.options[document.form.date.selectedIndex].value;"
style="color: black; font: 7pt Verdana, Arial, Helvetica, sans-serif;">
<%
	Response.write "<option> --- </option>"
For d = 01 to 31
	Response.write "<option value=" & d & "/>" & d & "</option>"
Next
%>
</select>
<select name="month"
onChange="document.form.birthday.value=document.form.birthday.value+document.form.month.options[document.form.month.selectedIndex].value;"
style="color: black; font: 7pt Verdana, Arial, Helvetica, sans-serif;">
<%
	Response.write "<option> --- </option>"
For m = 01 to 12
	response.Write "<option value=" & m & "/>" & MMtoMMM(m) & "</option>"
Next
%>		
</select>
<% 
Dim three_years_ago
three_years_ago = year(date) - 3
%>
<select name="year"
onChange="document.form.birthday.value=document.form.birthday.value+document.form.year.options[document.form.year.selectedIndex].value;"
style="color: black; font: 7pt Verdana, Arial, Helvetica, sans-serif;">
<%
	Response.write "<option> --- </option>"
For y = three_years_ago to year(date)
	Response.Write "<option value=" & y & ">" & y & "</option>"
Next
%>
</select>

<input type="text" name="birthday" size="5" style="font:7pt;" value="" maxLength="10"> 

<img src="images/required.gif"  onclick="javascript: checkBirthday(document.form.birthday);" value="Confirm">
</form>