function ValidaEmail (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) 
	{
		return false;
	}

	var user=matchArray[1]
	var domain=matchArray[2]
	
	if (user.match(userPat)==null) 
	{
		// usuario invalido
		return false;
	}

	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) 
	{
	    // Endereco IP
		  for (var i=1;i<=4;i++) 
		  {
		    if (IPArray[i]>255) 
		    {
				return false;
		    }
	    }
	    return true
	}
	
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
	    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) 
	{	   
	   return false;
	}

	if (len<2) 
	{
		var errStr="Está faltando o nome do servidor no email!"
		return false;
	}

		return true;
}