function emailCheck(emailStr)
{
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+';
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

	var matchArray=emailStr.match(emailPat);

	if (matchArray==null)
	{
//		alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];


	for (i=0; i<user.length; i++)
	{
		if (user.charCodeAt(i)>127)
		{
//			alert("Ths username contains invalid characters.");
			return false;
		}
	}
	for (i=0; i<domain.length; i++)
	{
		if (domain.charCodeAt(i)>127)
		{
//			alert("Ths domain name contains invalid characters.");
			return false;
		}
	}


	if (user.match(userPat)==null)
	{
//		alert("The username doesn't seem to be valid.");
		return false;
	}


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


	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++)
	{
		if (domArr[i].search(atomPat)==-1)
		{
//			alert("The domain name does not seem to be valid.");
			return false;
		}
	}


	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1)
	{
//		alert("The address must end in a well-known domain or two letter " + "country.");
		return false;
	}


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


	return true;
}



/*
function validateEmail(form_id,email)
{
	var address = document.forms[form_id].elements[email].value;
	if(emailCheck(address) == false)
	{
		alert('The email address field must contain a valid email address');
		return false;
	}
	return true;
}
				<form name="mailform" action="/scripts/sendmail.php" method="post" onSubmit="return validateEmail(this.email.value)">
*/

function validateEmail(emailaddy)
{
	if(!emailCheck(emailaddy))
	{
		alert('Please enter a valid email address (i.e. yourname@domain.com).');
		return false;
	}
	return true;
}


function validateEmail(emailAddy, realName)
{
	if(realName.length <=0)
	{
		alert('Please enter your name.');
		return false;
	}

	if(!emailCheck(emailAddy))
	{
		alert('Please enter a valid email address (i.e. yourname@domain.com).');
		return false;
	}

	return true;
}

function validateForm(emailAddy, realName, rf_CoName, rf_Address, rf_Tel)
{
	if(rf_CoName.length <=0)
	{
		alert("Please enter your company's name.");
		return false;
	}

	if(rf_Address.length <=0)
	{
		alert('Please fill in your company address.');
		return false;
	}

	if(rf_Tel.length <=0)
	{
		alert('Please enter your contact telephone number.');
		return false;
	}


	if(realName.length <=0)
	{
		alert('Please enter your name.');
		return false;
	}

	if(!emailCheck(emailAddy))
	{
		alert('Please enter a valid email address (i.e. yourname@domain.com).');
		return false;
	}

	return true;
}