How to move next textbox in javascript ?

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Hai
I have 6 textbox for enter serial number in asp.net.i have to move next textbox automatically after 4 letters enter in each textbox.The below code is works, but if i change input type to asp TextBox it not work .

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>JavaScript to automatically move from one field to another field</title>
<script type="text/javascript">
function movetoNext(current, nextFieldID) {
if (current.value.length >= current.maxLength) {
document.getElementById(nextFieldID).focus();
}
}
</script>
</head>
<body>
Enter your Text:
<input type="text" id="first" size="4" onkeyup="movetoNext(this, 'second')" maxlength="3" />
<input type="text" id="second" size="4" onkeyup="movetoNext(this, 'third')" maxlength="3" />
<input type="text" id="third" size="5" maxlength="4" />
</body>
</html>

onkeyup properties is not work.

Below code aslo not work

HTML

document.getElementById('txt1').onkeydown = function() {
  if (this.value.length == this.maxLength)
    document.getElementById('txt2').focus();
}

Not: i am use master page and i want to use asp textbox ,pls reply me asap.
pls reply with use master page also(i.e document.getElementById("Contenplacholder1_txtone"))

Regards
Aravind

Posted 8-Jul-13 1:01am

Aravindba

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kiritg 26-Feb-14 8:56am

http://aspsolutionkirit.blogspot.com/2014/02/how-to-move-to-next-textbox-in-aspnet.html

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