How do I validate that the values are not left blank? One is a simple form value and the other is generated by a calculation.
//I need to validate that these form values are not blank prior to submission of the form
<form id="sendit" action="http://ntsacom.homestead.com/TEST3.html" method="get">
Player Name: <input name="PLAYER_NAME" />
<div id="age" style="visibility: hidden;">
League Age:<input name="league_age" readonly />
<input type="submit" value="Submit this player" />