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

	var domainArray=domain.match(domainPat)
	if (domainArray==null) 
	{
		alert("The domain name in the Email Address seems invalid")
		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>4) 
	{
		alert("Email Address must end in a valid domain or two letter country")
		return false
	}

	if (len<2) 
	{
		var errStr="Email Address is missing a hostname"
		alert(errStr)
		return false
	}
	return true;
}

function js_round(value)
{
	float_value=parseFloat(value)*100;
	float_value=Math.round(float_value);
	return(float_value/100);
}