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) 
	{
	return false;
	}

var user=matchArray[1];
var domain=matchArray[2];

for (i=0; i<user.length; i++) 
	{
	if (user.charCodeAt(i)>127)
		{
		return false;
		}
	}

for (i=0; i<domain.length; i++) 
	{
	if (domain.charCodeAt(i)>127)
		{
		return false;
		}
	}


if (user.match(userPat)==null)
	{
	return false;
	}

 
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)
		{
		return false;
		}
	}


if (checkTLD && domArr[domArr.length-1].length!=2 && 
	domArr[domArr.length-1].search(knownDomsPat)==-1)
	{
	return false;
	}


if (len<2)
	{
	return false;
	}

return true;
}