function isEmailAddr(email)
{
  var result = false
  var theStr = new String(email)
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validate() 
{
   if (document.Form1.Email.value == "")
  {
    alert("Please enter your Email address.");
    document.Form1.Email.focus();
    return (false);
  }

  if (!isEmailAddr(document.Form1.Email.value))
  {
    alert("Please enter a valid Email address.");
    document.Form1.Email.focus();
    return (false);
  }
}