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POHiding <option>s in IE
 

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    <p>I wrote this nifty function to filter select boxes when their value is changed...</p> <pre><code>$.fn.cascade = function() { var opts = this.children('option'); var rel = this.attr('rel'); $('[name='+rel+']').change(function() { var val = $(this).val(); var disp = opts.filter('[rel='+val+']'); opts.filter(':visible').hide(); disp.show(); if(!disp.filter(':selected').length) { disp.filter(':first').attr('selected','selected'); } }).trigger('change'); return this; } </code></pre> <p>It looks at the <code>rel</code> property, and if the element indicated by <code>rel</code> changes, then it filters the list to only show the options that have that value... for example, it works on HTML that looks like this:</p> <pre><code>&lt;select id="id-pickup_address-country" name="pickup_address-country"&gt; &lt;option selected="selected" value="CA"&gt;Canada &lt;/option&gt; &lt;option value="US"&gt;United States &lt;/option&gt; &lt;/select&gt; &lt;select id="id-pickup_address-province" rel="pickup_address-country" name="pickup_address-province"&gt; &lt;option rel="CA" value="AB"&gt;Alberta &lt;/option&gt; &lt;option selected="selected" rel="CA" value="BC"&gt;British Columbia &lt;/option&gt; &lt;option rel="CA" value="MB"&gt;Manitoba &lt;/option&gt;... &lt;/select&gt; </code></pre> <p>However, I just discovered it doesn't work properly in IE (of course!) which doesn't seem to allow you to hide <code>options</code>. How can I work around this?</p> <hr> <p>Here's what I've got now:</p> <pre><code>(function($) { $.fn.cascade = function() { var filteredSelect = $(this); var filteredOpts = this.children('option'); var triggerSelect = $('[name='+this.attr('rel')+']'); triggerSelect.change(function() { var triggerValue = $(this).val(); filteredOpts.detach() .filter('[rel='+triggerValue+']').appendTo(filteredSelect) .filter(':first').attr('selected','selected'); }).trigger('change'); return this; } })(jQuery); </code></pre> <p>Which does work in IE, but still has two problems. The <code>.filter(':first').attr('selected','selected');</code> bit doesn't seem to do anything in IE (it should select the first visible element). Since I've been using <code>appendTo</code> it currently defaults to the last. And the other problem is that since I detach all the elements immediately, you can't have default values in your HTML.</p>
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