function isPrivateEmail(email, required) {
     if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
	var tAry1 = email.split("@");
	var UserName = tAry1[0];
	var Domain = tAry1[1].split(".");
	var DomainName=Domain[0];
	
	
    if (DomainName == "yahoo" ||DomainName == "hotmail" ||DomainName == "msn"  ||DomainName == "aol" ||DomainName == "gmail"  ||DomainName == "rediffmail") {
    return false;
    }    
    return true;
}