asked on

checking the value in textbox

hi
I 've got textfield, while entering the text, it should check for the each and every alphabet and should give message if alphabet is repeated

for eg. if i am entering "alpha" it should give alert message while entering the "a" second time.

TIA

ASKER CERTIFIED SOLUTION

CJ_S

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Michel Plungjan

You may want to do
for(i=0;i<val.length;i++) {
ch = val.charAt(i).toLowerCase();
if(alfabet.indexOf(ch)>=0) {
alert("Invalid character: "+val.charAt(i))
return false;
}
alfabet += ch;
}

Michel

Michel Plungjan

in case you do NOT want it case sensitive

CJ_S

Michel,
not to criticize you. But do you remember the conversaion we had about this a long time ago. And that we both agreed on not "steeling" each others "answers"? Because that is what you are doing right now. I'm not going to defend myself after your comment...but I'd appreciate it if you too would keep that in mind.

Regards,
CJ

Michel Plungjan

1. I am not steeling since I am only adding to your code, not posting a new version
2. If you really want to we can discuss how many questions you manage to put your clammy little hands on lately. It could be hard to get the points to stay in the advanced ee with you around ;-)

Michel

CJ_S

1) True...
2) Not true... I have big hands, but even then it's not true. The thing was that we had a deal, and the only recent question that I can recall that I jumped in a question in which you were active was something about an onload function not being called due to the . Which was a totally different comment than any of yours.

Again, I am not critizing, but just reminding. I don't feel anything for an argument.

regards,
CJ

Michel Plungjan

Comments are always welcome - it is complete pieces of code that bothers me more - and only if they are variations and then gets accepted as answers

Michel

CJ_S

Michel,
but that's exactly what you have just done. You might see it as an addition to my comment, but still it's a complete piece of code.

CJ_S

additional addition: it's a complete piece of code which is the same as I wrote but with one change...

Michel Plungjan

I mean something like this:

<html>
<head>
<script>
function validate(tObj)
{
var alfabet="";
var val = tObj.value;
for(i=0;i<val.length;i++)
{
ch = val.charAt(i).toLowerCase();
if(alfabet.indexOf(ch)>=0)
{
alert("Invalid character: "+val.charAt(i))
return false;
}
alfabet += ch;
}
}
</script>
</head>

<body>
<form name="myForm">
<input type="text" onKeyUp="validate(this)">
</form>
</body>
</html>

Just posting a changed function is not what I meant.
You are being a bit protective today huh?

Kousis: Please forgive our discussion and accept CJ's answer.

Michel

CJ_S

Michel,
I'm not going to argue...

COBOLdinosaur

<observation>
lounge might be a better place for this discussion than in a Q.
</observation>

Cd&

klaetu

This question is still open today, waiting for your response.

Please finalize this question, or update us as to what else you need. There are several working comments and you have several open questions.

Thank you very much. Your attention to this is appreciated so others may benefit from this question,
once finalized, since it will move to our PAQ and others can find help from this as well.

Klaetu
moderator @ experts-exchange

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