Validate email -- check for more than one dot

Question

I'm looking to validate and email address and I found how to check for a single dot "[email protected]"  with  email_txt.text.indexOf('.') < 0  but I want to also want to check to see if the user may have entered two dots "[email protected]"
I tried:
email_txt.text.indexOf('.') < 0 ||  email_txt.text.indexOf('.') >2 but that makes it puke all of the time.
I also tried:
email_txt.text.indexOf('.') < 0 && >2 and that one threw all kinds of errors.
I don't know if I've ever seen anyone check for that, so I might be a little over zealous, but I thought I'd give it a try.
Thanks in advance

Answer 1

function validateEmailF(inputEmail:String):Boolean {
    //check for spaces
    if (inputEmail.indexOf(" ")>0) {
        return false;
    //bust the email apart into what comes before the @ and what comes after
    var emailArray:Array = inputEmail.split("@");
    //make sure there's exactly one @ symbol
    //also make sure there's at least one character before and after the @
    if (emailArray.length != 2 || emailArray[0].length == 0 || emailArray[1].length == 0) {
        return false;
    //bust apart the stuff after the @ apart on any . characters
    var postArray:Array = emailArray[1].split(".");
    //make sure there's at least one . after the @
    if (postArray.length<2) {
        return false;
    //make sure there's at least 1 character in in each segment before, between and after each .
    for (var i:Number = 0; i<postArray.length; i++) {
        if (postArray[i].length<1) {
            return false;
    //get what is left after the last .
    var suffix = postArray[postArray.length-1];
    //make sure that the segment at the end is either 2 or 3 characters
    if (suffix.length<2 || suffix.length>3) {
        return false;
    //it passed all tests, it's a valid email
    return true;
}