// JavaScript Document<script type="text/javascript">
function validateChar()
{
var selectstatus="false";
var s=document.form1.zip.value;
if(s.length!=5)
{
alert('Please enter a valid U.S. zip code.');

return false;

}
var re = /^[\w ]+$/
if(!re.test(s)) {
      alert("Please enter only valid characters!");
      document.form1.zip.focus();
      return false;
}




document.form1.submit();

}