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POAccessing live value of a DOM element
 

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  1. POAccessing live value of a DOM element
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    <p>I have a hidden input that has a default value, which can be changed depending on the value of the selected radio button associated with it.</p> <p>So, if I select the second radio button, the js_file_path hidden input will have its value changed to "/shared". Nice and easy, and I've got this to work fine. </p> <p>My problem is when I try to get js_file_path's value via jQuery <code>$("#js_file_path").val()</code>, I always get the value of the hidden field when the page was loaded. How do I get its current value instead? I know of the live() handler and its purpose, but not quite sure how to make use of it in this context where I'm trying to pass "js_file_path"'s value as a function argument.</p> <p>Any help is appreciated.</p> <p>EDIT:</p> <p>This is the code to detect the value of the file path has changed.</p> <pre><code>&lt;input type="hidden" id="js_local_file_path" value="local"&gt; &lt;input type="hidden" id="js_shared_file_path" value="shared"&gt; &lt;input type="radio" name="js_type_for_file_upload" value="local" checked&gt; &lt;input type="radio" name="js_type_for_file_upload" value="shared"&gt; &lt;input type="hidden" id="js_file_path" value="local"&gt; $("[name=js_type_for_file_upload]").live( "change", function(){ switch( $(this).val() ){ case "local": $("#js_file_path").val( $("#js_local_file_path").val() ); // do other stuff break; case "shared": $("#js_file_path").val( $("#js_shared_file_path").val() ); // do other stuff break; } });` </code></pre> <p>So, when I select the second radio button and check the DOM I can see that the js_file_path's value has been changed to "shared" correctly.</p> <p>I then try to proceed and make a function call that includes the value of js_file_path as its argument when a button with an id "button" is clicked.</p> <pre><code>$("#button").click( function(){ a_name_of_a_function( $("#js_file_path").val() ); }); </code></pre> <p>For debugging, I put an alert prompt inside a_name_of_a_function() to output its file_path's parameter's value.</p> <pre><code>function a_name_of_a_function( file_path ){ alert( file_path ); // other stuff } </code></pre> <p>Even if I've selected the "shared" radio button, the alert prompt will always displays "local".</p>
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    1. COHow do you know that the value of `js_file_path` is actually changed? I would say that `$("#js_file_path").val()` remaining its initial value is a good clue that your code for changing `js_file_path` is not working.
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      1. POAccessing live value of a DOM element
      1. USRay Baxter
    2. COAgreed with @Ray Baxter. Can you post the jQuery code in question?
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      1. POAccessing live value of a DOM element
      1. USJames Allardice
    3. COI know via a change event handler attached to the radio button whose name attribute is called, "js_type_for_file_upload". I've updated the original post to include it. I've inspected the DOM using Chrome, and the value does change correctly when the radio button's value is changed.
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