function clearEmail() {
if(document.optin.email.value == "Your E-mail Address") document.optin.email.value = "";
}

function checkEmail (emailStr)
{
	var num_error=0;
	var NewemailStr="";
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var invalidchars="\\(\\)\\{\\}\/%?\\$\\s\\^~#!&`\\*\\|=@<>,;:\\\\\\\"\\\[\\\]'"
	var validChars="\[^\\s" + specialChars + "\]"
	var validChars1="\[^\\s" + invalidchars + "\]"
	var quotedUser=/(\"\[^\"\]*\"\')/
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var atom1=validChars1 + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var word1="(" + atom1 + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" +  word1 + "(" + word1 + ")*$")

	if (emailStr == "") {
		// change to false
		return "An email address is required";
	} else {
		var NewemailStr=emailStr;
		// need to trim space beginning and the end each email, then pass back to the form.
	}

	var matchArray=NewemailStr.match(emailPat);

	if (matchArray==null) {
		return "E-mail address is not a valid format (check @ and .'s)";
	}
	var user=matchArray[1];
	var domain=matchArray[2];

	if (user.match(userPat)==null) {
		return "The username in the email address doesn't seem to be valid.";
	}

		var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null)
	{
		for (var i=1;i<=4;i++)
		{
			if (IPArray[i]>255)
			{
				return "Destination IP address in the email address is invalid!";
			}
		}
		return true;
	}

	var domainArray=domain.match(domainPat);
	if (domainArray==null) {
		return "The domain name in the email address doesn't seem to be valid.";
	}

	if(domain.length>0)
	{
		if(domain.charAt(0)==".")
		{
			return "The domain name in the email address doesn't seem to be valid.";
		} else if(domain.charAt(domain.length-1)==".")
				 {
			return "The domain name in the email address doesn't seem to be valid.";
				 } else {
			var errors=0;
			for(var k=1; k<domain.length; k++)
			{
				if(domain.charAt(k)==".")
					errors++;
				if((domain.charAt(k)==".") && (domain.charAt(k+1)=="."))
						  {
					 errors=errors + 5;
					 k=domain.length;
				}
			}
			if(errors>4)
			{
				return "The domain name in the email address doesn't seem to be valid.";
			}
		}
	}

	var atomPat=new RegExp(atom,"g");
	var domArr=domain.match(atomPat);

	var len=domArr.length;
	if (domArr[domArr.length-1].length < 2)
	{
	   return "The email address must end in a valid domain.";
	}

	if (len<2)
			  {
	   return "This email address is missing a hostname!";
	}

	return "good";
}

function valOptin(form) {
	var ttalert = "";
	var newsletter_count = 0;
	if (typeof form.newsletters.length == "undefined") {
		// only 1 newsletter in widget
		if(form.newsletters.checked) {
			newsletter_count++;
		}
	} else {
		for (i=0;i < form.newsletters.length; i++) {
			if(form.newsletters[i].checked) {
				newsletter_count++;
			}
		}
	}
	if (newsletter_count == 0) {
		ttalert += "No newsletters have been selected.\n"
	}
	// EMAIL ADDRESS
	if (typeof form.email != "undefined") {
		if (form.email.value == '') {
			ttalert += 'Please enter an Email address.\n'
			form.email.focus()
		} else {
			emailStatus = checkEmail(form.email.value)
			if (emailStatus != 'good') {
				ttalert += emailStatus
				ttalert += '\n'
			form.email.focus()
			}
		}

	}
	// show errors or submit form
	if (ttalert != "") {
		alert (ttalert);
	} else {
		form.submit();
		// clear input entries
		form.email.value = "";
	}
}