CLAS Website Newsletter signup

<script type="text/javascript">
<!--
// isEmail (STRING s [, BOOLEAN emptyOK])
// whitespace characters
var whitespace = " \t\n\r";

//
// Email address must be of form a@b.c ... in other words:
// * there must be at least one character before the @
// * there must be at least one character before and after the .
// * the characters @ and . are both required
function isValidEmail(s)
{
	if (isEmpty(s)) return false;

	// is s whitespace?
	if (isWhitespace(s)) return false;

	// there must be >= 1 character before @, so we
	// start looking at character position 1
	// (i.e. second character)
	var i = 1;
	var sLength = s.length;

	// look for @
	while ((i < sLength) && (s.charAt(i) != "@"))
	{ i++
	}

	if ((i >= sLength) || (s.charAt(i) != "@")) return false;
	else i += 2;

	// look for .
	while ((i < sLength) && (s.charAt(i) != "."))
	{ i++
	}

	// there must be at least one character after the .
	if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
	else return true;
}

// Check whether string s is empty.
function isEmpty(s)
{
	return ((s == null) || (s.length == 0))
}

// Returns true if string s is empty or
// whitespace characters only.
function isWhitespace(s)
{
	var i;

    // Is s empty?
    if (isEmpty(s)) return true;

    // Search through string's characters one by one
    // until we find a non-whitespace character.
    // When we do, return false; if we don't, return true.
    for (i = 0; i < s.length; i++)
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		// Check that current character isn't whitespace.
		var c = s.charAt(i);

		if (whitespace.indexOf(c) == -1) return false;
    }
    // All characters are whitespace.
    return true;
}

function checkForm() {
	if (!isValidEmail(document.subscribeForm.elements['Email Address'].value)) {
	document.subscribeForm.elements['Email Address'].style.backgroundColor='yellow';
		alert("Please enter a valid Email Address. (name@host.com)");
		document.subscribeForm.elements['Email Address'].focus();
		return false;
	}
}
//-->
</script>

<form action="http://cl.exct.net/DEManager.aspx" name="subscribeForm" method="post" onSubmit="return checkForm();">
    <input type="hidden" name="_clientID" value="7201485" />
    <input type="hidden" name="_deExternalKey" value="B7B20446-7AE9-4C70-AD7B-24F4FC00B1BC" />
    <input type="hidden" name="_action" value="add" />
    <input type="hidden" name="_returnXML" value="0" />
    <input type="hidden" name="_successURL" value="https://clas.asu.edu/manage-subscriptions-success" />
    <input type="hidden" name="_errorURL" value="https://clas.asu.edu/manage-subscriptions-error" />	

  <div class="row">

    <div class="col-md-6">

      <h2>Your Information</h2>

      <div class="form-group">
        <label for="firstNameInput">First Name</label>
        <input class="form-control" id="firstNameInput" placeholder="First Name" name="First Name">
      </div>

      <div class="form-group">
        <label for="lastNameInput">Last Name</label>
        <input class="form-control" id="lastNameInput" placeholder="Last Name" name="Last Name">
      </div>

      <div class="form-group">
        <label for="emailAddressInput">Email Address</label>
        <input type="email" class="form-control" id="emailAddressInput" placeholder="Email Address" name="Email Address">
      </div>

    </div>

  </div>

  <div class="row">

    <div class="col-md-6">

      <button type="submit" class="form-submit btn btn-primary">Submit</button>

    </div>

  </div>

</form>