function validate() {
	if (mainform.subscriber_email.value=='Enter your email') {
		document.mainform.subscriber_email.focus();
		document.mainform.subscriber_email.select();
		alert('Please enter your email address, and press \'Join\'.');
		event.returnValue=false;
	} else if ( !isEmail(mainform.subscriber_email.value) ) {
		document.mainform.subscriber_email.focus();
		document.mainform.subscriber_email.select();
		alert('You must enter a valid email address.  Please try again!');
		event.returnValue=false;
	}
}
function isEmail(str) {
  // are regular expressions supported?
  var supported = 0;
  if (window.RegExp) {
    var tempStr = "a";
    var tempReg = new RegExp(tempStr);
    if (tempReg.test(tempStr)) supported = 1;
  }
  if (!supported) 
    return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
  var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
  var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$");
  return (!r1.test(str) && r2.test(str));
}

function goClear(theData) {

         theData.value = ""
 }