Change value by JavaScript

Question

The value of the button should change in 1 or 0, but the echo $_POST["ordina"] give always 1 and I don't understand because the code seems correct.

<script> function order() {
if (document.ordination.ordina.value == "1") { 
    document.ordination.ordina.value = "0";
} else { 
    document.ordination.ordina.value = "1"; 
} }</script>

<?php echo $_POST["ordina"]; ?>

<form id="ordination" name="ordination" method="POST" action="">
<button type="submit" value="1" class="button" name="ordina" onclick="order();return true;">Ordina</button>

The alert(document.ordination.ordina.value) give always 1.

Some can help me?

alert(document.ordination.ordina.value) first to see if you are accessing the right thing :) — Andrius Naruševičius
– Andrius Naruševičius, Commented Mar 28, 2013 at 12:26
Every time you submit the form, the page is loading, so the if condition will never be true and the value will always be set to 1. — ShoibAhamed
– ShoibAhamed, Commented Mar 28, 2013 at 12:37

MKV · Accepted Answer · 2013-03-28 12:59:13Z

1

Check it now..

<script> function order() {
if (document.ordination.ordina.value == "1") {
     alert(document.ordination.ordina.value);  // this one shows 1
    document.ordination.ordina.value = "0";
} else { 
    alert(document.ordination.ordina.value);  // this one shows 0
    document.ordination.ordina.value = "1"; 
} }</script>

<?php echo $_POST['ordina'];?>

<form id="ordination" name="ordination" method="POST" action="">
<button type="submit" value="<?php if(isset($_POST['ordina'])){echo $_POST['ordina'];}else{ echo '1';}?>" class="button" name="ordina" id="ordina" onclick="order();return true;">Ordina</button>

after you submit this form the <?php echo $_POST['ordina'];?> is 0... and set to button value as 0 and again submit the value can be changed to 1.

and its consequently changed 0 to 1 to 0 to 1 but you have first time load this page means the alert shows 1 only..

edited Mar 28, 2013 at 12:59

answered Mar 28, 2013 at 12:29

MKV

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3 Comments

David G Over a year ago

How does this answer the question? Or even solve the problem?

MKV Over a year ago

They need only the alert=>alert(document.ordination.ordina.value) . first alert shows '1' and second alert shows '0' because the value changed by the script document.ordination.ordina.value = "0";. and submitting the value returned by the echo $_POST['ordina'] is 0 only.. pls check this in your environment..

MKV Over a year ago

now i have edited by the value in button element => value="<?php if(isset($_POST['ordina'])){echo $_POST['ordina'];}else{ echo '1';}?>"

Xavier S. · Accepted Answer · 2013-03-28 12:34:40Z

1

This always return 1, because your button is a "submit" button, so the body is reloaded each time you click on the button.

    <script>
    function order() {
    if (document.ordination.ordina.value == "1") { 
        document.ordination.ordina.value = "0";
    } else { 
        document.ordination.ordina.value = "1"; 
    }
    alert(document.ordination.ordina.value);
    }
    </script>

    <form id="ordination" name="ordination" method="POST" action="">
    <button type="button" value="1" class="button" name="ordina" id="ordina" onclick="order();return true;">Ordina</button>

    </form>

I change type "submit" for "button", then it works.

answered Mar 28, 2013 at 12:34

Xavier S.

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Comments

웃웃웃웃웃 · Accepted Answer · 2013-04-01 03:56:53Z

0

<script> function order() {
if ($("#ordina").val() == "1") { 
    $("#ordina").val(0);
} else { 
    $("#ordina").val(1); 
} }</script>

<?php echo $_POST["ordina"]; ?>

<form id="ordination" name="ordination" method="POST" action="">
<button type="submit" value="1" class="button" name="ordina" id="ordina" onclick="order();return true;">Ordina</button>

edited Apr 1, 2013 at 3:56

answered Mar 28, 2013 at 12:28

웃웃웃웃웃

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2 Comments

David G Over a year ago

What is va supposed to be?

MKV Over a year ago

$("#ordina").va() its not a correct stmt .. $("#ordina").val() is the right one.

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