function emailCheck (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)
		{
		alert("Email address seems incorrect (check @ and .'s)");
		return false;
		}
	var user=matchArray[1];
	var domain=matchArray[2];
	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 domainArray=domain.match(domainPat)
	if (domainArray==null)
		{
		alert("The domain name doesn't seem to be valid.");
    	return false;
		}
	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>3)
		{
   		alert("The address must end in a three-letter domain, or two letter country.");
		return false;
		}
	if (len<2)
		{
   		var errStr="This address is missing a hostname!";
		alert(errStr);
		return false;
		}
	return true;
	}
	function CheckContact()
		{
		var error = 0;
		var errormsg = "Please check the following items.";
		if (document.ContactForm.sname.value == "")
			{
			var error = 1;
			var errormsg = errormsg + "\n • name";
			}
		if (document.ContactForm.semail.value == "")
			{
			var error = 1;
			var errormsg = errormsg + "\n • email address";
			}
		if (error == 1)
			{
			alert(errormsg);
			return false;
			}
		else
			{
			return true;
			}
		}