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
		}
		vEmail = emailStr.split('@');
		if (vEmail[0].toUpperCase()=='SPAM'||vEmail[0].toUpperCase()=='NOSPAM') return false;
		vEmail = vEmail[1].split('.')
		for (var f=0;f<vEmail.length;f++)
			if (vEmail[f].toUpperCase()=='SPAM'||vEmail[f].toUpperCase()=='NOSPAM') return false;

		return true;
	}