function validateEmail(emailStr)
{
	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) 
	{
		return "\nThe email address supplied seems to be invalid. (check @ and .'s)"
	}
												
	var user=matchArray[1]
	var domain=matchArray[2]

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

	var domainArray=domain.match(domainPat)

	if (domainArray==null) 
	{
		return "\nThe email address supplied includes an invalid domain name"
	}
													
	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length

	if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>4) 
	{
		return "\nThe email address supplied does not have a correct suffix (.co.uk, .com...)"
	}
	if (len<2)
	{
		return "\nThe email address supplied is missing a hostname"
	}

	//If we've gotten this far, everything's valid	
	return true;
}