<script language="Javascript"> function validate() { var dateEntered = new Date( document.getElementById("Date") + " " + document.getElementById("Time") ); var dateNow = new Date(); if( dateNow - dateEntered > 1000*60*60*12 ) { alert( "Date entered is too old." ); return( false ); } return( true ); }</script><form method=post action="blah.html" onsubmit="Javascript: return( validate() );"> <input type=text id=Date name=Date> <input type=text id=Time name=Time> <input type=submit value="Submit"></form>
