Yeah, you're right, that one is a little too simple.
Another one I've used is this:
--------------------------------------------------
// vars
var checkStr:String =
"._-abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
var isValid:Boolean;
var inputTxt:TextInput;
var valBtn:Button;
var resultTxt:TextArea;
function clicked() {
resultTxt.text = (validateEmail(inputTxt.text)) ? "email is valid" :
"email is not valid";
}
valBtn.addEventListener("click", clicked);
function validateEmail(ti:String):Boolean {
// ti = text input field string
atChrIndex = ti.indexOf("@");
dtChrIndex = ti.lastIndexOf(".");
if(atChrIndex < dtChrIndex){
frstStr = ti.slice(0,atChrIndex);
mdleStr = ti.slice(atChrIndex+1, dtChrIndex);
lastStr = ti.slice(dtChrIndex+1, ti.length);
if(getStrValid(frstStr) && getStrValid(mdleStr) &&
getStrValid(lastStr)){
return true;
} else {
return false;
}
} else {
return false;
}
}
function getStrValid(ti:String):Boolean {
isValid = true;
for(var i=0;i<ti.length;i++){
if(checkStr.indexOf(ti.charAt(i)) == -1) isValid = false;
}
return isValid;
}
--------------------------------------------------
The above script check for a "@" followed by the last instance of ".",
and then splits the email string into three separate strings, and then
checks if all the characters in those strings correspond to checkStr. In
my script, more than one "." character is allowed in the email, cause
I've seen some addresses being something like
"[EMAIL PROTECTED]", which isn't allowed in
Bokelberg's script.
Email validation is fine, to a certain point. Maybe it's just me, but I
try and spend the least amount of time on the issue; if a user wants to
purposefully try and break the email validation (which they would need
to in order to get past a script like the above) then they deserve not
to get signed up for whatever. A good signup routine is not just about
email validation, but about confirmation: if they purposefully put in an
invalid email (which gets past the above routine), then they can't
confirm. Sucks to be them.
Of course, the simplest thing if you're doing a lot of string validation
in your AS2 application is to use a RegExp class.
__________________________________________________________
Joseph Balderson, Flash Platform Developer
http://www.joeflash.ca | 416-768-0987
Writing partner, Community MX | http://www.communitymx.com
Consultant, New Toronto Group | http://www.newyyz.com
Rákos Attila wrote:
Well, this is too simple, there are too many invalid strings which are
considered as valid by this script. I think if you validate the input,
then do it correctly or don't validate at all :) An incomplete
validation makes you feel that your data is valid and secure, however
it can lead to unexpected problems later.
Attila
JB> I got a much simpler one:
JB>
JB> Check for invalidity:
JB>
JB> // ti = text input field
JB> if((ti.text.indexOf("@") == -1) ||
JB> (ti.text.indexOf(".",(ti.text.indexOf("@")+2)) == -1) ) {
JB> // email is invalid
JB> }
JB>
JB> OR...
JB>
JB> Check for validity:
JB>
JB> // ti = text input field
JB> if((ti.text.indexOf("@") != -1) &&
JB> (ti.text.indexOf(".",(ti.text.indexOf("@")+2)) != -1) ) {
JB> // email is valid
JB> }
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