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POUnable to check if a javascript checkbox array element is checked or not?
 

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  1. POUnable to check if a javascript checkbox array element is checked or not?
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    <p>What is want is - when the checkbox is checked option no. 5 in select list will be selected and when the checkbox is unchecked option no. 0 will be selected in the select list.</p> <p>The select list and the checkboxes are generated dynamically in the php code as below :</p> <pre><code>echo "&lt;select name='coupons".$i."' id='coupons".$i."'&gt;"; ------- All Options -------- echo "&lt;/select&gt;"; &lt;input type='checkbox' name='myCheckbox[]' value='&lt;?php echo $i."_".$row-&gt;id; ?&gt;' onclick='setCCode("myCheckbox[]",&lt;?php echo $i;?&gt;)'&gt; ----------------------------------------------------------------------------- </code></pre> <p>Solved the second requirement on my own now ..... thanks to all for your inputs</p> <p>just added the following line in the <code>checkAll()</code> within the <code>for loop</code></p> <pre><code>setCCode(children[i],i+1); </code></pre> <p>The javascript function :</p> <pre><code>function setCCode(checkbox_name,i) { var form_object = document.getElementsByName(checkbox_name+"["+i+"]"); var selname = document.getElementsByName("coupons"+i)[0]; if(form_object.checked) { selname.selectedIndex = 5; } else { selname.selectedIndex = 0; } } </code></pre> <p>The above issue is solved....... thanks to all </p> <p>Now what i need to do is when a user checks a checkbox to select or deselect all the dynamically generated checkboxes on the form the above logic should work.</p> <pre><code>&lt;input type='checkbox' name='checkall' onChange="checkAll(this, 'myCheckbox[]')"&gt; &lt;span class="chkall"&gt;Check / Uncheck All&lt;/span&gt; &lt;input type='checkbox' name='myCheckbox[]' value='&lt;?php echo $i."_".$row-&gt;id; ?&gt;' onclick='setCCode(this,&lt;?php echo $i;?&gt;)'&gt; </code></pre> <p>The javascript code i am using to select/deselect all checkboxes on form is as below :</p> <pre><code>function checkAll(parent, field) { var children = document.getElementsByName(field); var newValue = parent.checked; for (i = 0; i &lt; children.length; i++){ if (children[i].disabled == false) { children[i].checked = newValue; } } } function setCCode(Sender,i) { document.getElementsByName("coupons"+i)[0].selectedIndex = Sender.checked ? 5 : 0; } </code></pre>
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