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    <p>There are some errors in your fiddle:</p> <ul> <li>Your function <code>set_checked</code> is declared in the onLoad-Handler (as selected), and is only available in that locally and not in the global scope. Remove the wrapping function by selecting "no wrap (head)" or assign your function to <code>window.set_checked</code>.</li> <li>Please note that the <code>checked</code> attribute only represents the <em>default value</em> of the checkbox, to change the actual state you need to use the <a href="https://developer.mozilla.org/en/DOM/HTMLInputElement" rel="nofollow noreferrer"><code>checked</code> property</a> (with jQuery, you can use <a href="http://api.jquery.com/val/" rel="nofollow noreferrer">val()</a>).</li> <li>If you wanted to change the default value, you can't do it by setting the attribute to (the string) <code>false</code>. The attribute represents a checked checbox through its existence, you would need to use <code>removeAttribute()</code> for disabling. It's easier to use the <code>defaultChecked</code> property with a boolean value.</li> <li>last but not least there's the obvious error detected by all others: To use a variable, you will need to <em>use it</em> instead of putting its name into a string (like in PHP).</li> </ul> <p>You also might be more happy with <code>id</code>s than <code>name</code> attributes. I've updated your fiddle with a proper solution: <a href="http://jsfiddle.net/vu6fs/7/" rel="nofollow noreferrer">http://jsfiddle.net/vu6fs/7/</a></p> <p>To disable the clear/select link when it's not appropriate:</p> <ul> <li>you can't <code>disable</code> a link (anchor) as you can a form element (see <a href="https://stackoverflow.com/questions/3929598/disable-link-using-javascript">Disable link using javascript</a>, <a href="https://stackoverflow.com/questions/970388/jquery-disable-a-link">jQuery disable a link</a>, <a href="https://stackoverflow.com/questions/2091168/disable-a-link-using-css">Disable link using css</a>). OK, we don't really need to disable its functionality (nothing changes), so so I guess you only think of graying it out.<br /> This can be done with CSS, and you'll need to trigger the update both on user-change events and the setting through <code>set_checked</code>. Example code at <a href="http://jsfiddle.net/vu6fs/9/" rel="nofollow noreferrer">http://jsfiddle.net/vu6fs/9/</a></li> <li>It might be easier to use just one link that toggles the checked state. Its lettering may change between "clear" and "select", depending on the current state.</li> </ul> <p>I now <a href="http://jsfiddle.net/mL4Z3/" rel="nofollow noreferrer">have written a plugin</a> (i.e. a jQuery prototype function) to add those links dynamically to any checkbox elements. That means it also can use (scoped) click handlers instead of a global-scope-polluting <code>set_checked</code> function.</p>
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    1. POhow to use string argument of a function in a jquery expression
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    1. COok it's working fine,thank you for your reply and can you tell me how to get my one more requirement
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    2. COIf my checkbox Id's are checkboxRead and checkboxWrite then.....
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    3. COcan you please give me the dynamic solution (I mean, it should be applicable for any div id's)
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