StackOverflow2013

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17024903
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2013-06-10T13:19:44.283
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2013-06-10T13:19:44.283
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Body
<p>You don't need to wait for your form to post before you can check to see if they selected a radio button. You can use javascript with the <code>onsubmit</code> listener like so:</p> <pre><code><form action="modificaPriorita.php" method="post" onsubmit="return validateForm();"> <table> <tr id="format-tabelle"> <th></th> <th><span class="format-celle">TITLE</span></th> <th><span class="format-celle">TYPE</span></th> </tr> <?php $res = GestioneSegnalazione::showSegnalazioni(); function drawTable($res) { $title = $res[0]; $idAuthor = $res[1]; $type = $res[2]; for ($i = 0; $i < $num; $i++) { print "<tr class='row'> <td align='center' valign='middle'> <input type='radio' name='radio' value='$title[$i],$idAuthor[$i]'/> </td> <td align='center' valign='middle'><span class='format-celle'> $title[$i]</span></td> <td align='center' valign='middle'><span class='format-celle'> $type[$i]</span></td> </tr>"; } } ?> </table> <br> <input type="submit" name="show" value="Show" class='freshbutton-orange' id='show-submit-segnalazione'/> </form> <script> function validateForm() { var radios = document.getElementsByName('radio'); var checked = false; for (var i = 0, length = radios.length; i < length; i++) { if (radios[i].checked) { checked = true; break; } } if (checked) { return true; } else { alert('Select one segnalazione to show'); return false; } } </script> </code></pre> <p>So what happens in this code is right before the form gets submitted runs the <code>validateForm()</code> function we set up. In that function it checks to see if a radio button is selected. If it is then the function returns true which allows the form to post. If it doesn't find a radio button selected it does the alert window and then returns false which prevents the form from posting. I hope this helps.</p>
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1. POget radio value in printing method in order to transfer some parameters to another page
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1. POget radio value in printing method in order to transfer some parameters to another page
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1. COit works!!! thank you very much, you saved me!! :)
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