function isEmailValid(email)
{
	if (window.RegExp)
	{
		var reg1str = "(@.*@)|(\\.\\.)|(@\\.)|(\\.@)|(^\\.)";
		var reg2str = "^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$";
		var reg1 = new RegExp(reg1str);
		var reg2 = new RegExp(reg2str);
		return (!reg1.test(email) && reg2.test(email))
	}
	else
	{
		var pos1 = email.indexOf("@");
		if(pos1<0) return false;
		var pos2 = email.lastIndexOf(".");
		if(pos2<pos1) return false;
		return true;
	}
}