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  1. POAccording to jQuery my custom function in not a function
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    <p>Error message (Last line):</p> <blockquote> <p>$("select").selectList is not a function</p> </blockquote> <p>Code:</p> <pre><code>(function( $ ){ $.fn.selectList = function(options) { var settings = { 'buttonClass' : 'custom-select', 'buttonTextClass' : 'custom-select-status', 'buttonIconClass' : 'custom-select-button-icon', 'menuClass' : 'custom-select-menu', 'menuClassHidden' : 'custom-select-menu-hidden' } $('body').click(function() { $('.' + settings.menuClass).each(function() { $(this).addClass(settings.menuClassHidden); }) }); return this.each(function() { if (options) { $.extend(settings, options); } var $this = $(this).hide(), $menu = $('&lt;ul&gt;&lt;/ul&gt;').addClass(settings.menuClass) .addClass(settings.menuClassHidden), optionsTexts = new Array(), currIdx; $this.find('option').each(function(idx) { var $opt = $(this); if ($opt.is(':selected')) { currIdx = idx; } optionsTexts[idx] = $opt.text(); }) for (var i = 0; i &lt; optionsTexts.length; i++) { var $item = $('&lt;li&gt;&lt;/li&gt;'), $link = $('&lt;a href="#"&gt;' + optionsTexts[i] + '&lt;/a&gt;'); if (i == currIdx) { $item.addClass('selected'); } $link.click(function() { var linkIdx = $link.parent().parent().find('li').index($link.parent()); $this.find('option').eq(linkIdx).attr('selected', 'selected'); $menu.prev().find('.' + settings.buttonTextClass).text($link.text()); if ($menu.hasClass(settings.menuClassHidden)) { $menu.removeClass(settings.menuClassHidden); } else { $menu.addClass(settings.menuClassHidden); } }); $item.append($link); $menu.append($item); } $menu.insertBefore($this); $('&lt;a href="#"&gt;&lt;/a&gt;') .html('&lt;span class="'+ settings.buttonTextClass + '"&gt;'+ optionsTexts[currIdx] +'&lt;/span&gt;&lt;span class="' + settings.buttonIconClass + '"&gt;&lt;/span&gt;') .addClass(settings.buttonClass) .insertBefore($menu) .click(function() { $('.custom-select-menu').addClass(settings.menuClassHidden); $menu.hasClass(settings.menuClassHidden) ? $menu.removeClass(settings.menuClassHidden) : $menu.addClass(settings.menuClassHidden); return false; }); }); }; })(jQuery); $(document).ready(function() { if (! $('.section-admin').length &gt; 0) { $('select').selectList(); } }); </code></pre> <p>Could somebody help?</p>
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