// JScript File

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 domain 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("Email 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;
	}