create javascript for automatic navigation to all textboxes of a page.?

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Hello All,

I have multiple textboxes on my page and i want to set it automatically navigate when it reaches to its max length of a textbox.
I am using this javascript code for this:-

XML

<script type="text/javascript">
    function checkSUP() {
        var letters = document.getElementById("TXTSUP").value.length + 1;
        if (letters <= 1) {
            document.getElementById("TXTSUP").focus();
        }
        else {
            document.getElementById("TXTPHE").focus();
        }
    }
</script>

but its not working...anyone suggest me the solution for this...

Posted 12-Mar-14 1:56am

abhishekagrwl25

Updated 12-Mar-14 2:04am

v2

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Snesh Prajapati · Answer 1 · 2014-03-12T07:37:00

I used below HTML and JavaScript code...and it is working as expected:

XML

First TextBox
<input id="TXTSUP" type="text" maxlength="5" onkeyup="checkSUP()" />
Second TextBox
<input id="TXTPHE" type="text" />

<script type="text/javascript">
    function checkSUP() {
        var maxCharForTXTSUP = document.getElementById("TXTSUP").getAttribute("maxlength");
        var numbersOfChar = document.getElementById("TXTSUP").value.length;

        if (numbersOfChar < maxCharForTXTSUP) {
            document.getElementById("TXTSUP").focus();
        }
        else {
            document.getElementById("TXTPHE").focus();
        }
    }
</script>

Just a caution...Do not use "value" attribute of input tags...It may add additional characters to length which we are getting in below line:

var numbersOfChar = document.getElementById("TXTSUP").value.length;