美化select的jquery插件

自己写的一个美化select插件，浏览器自带的实在太丑，还不能用css自定义。

插件主要原理是隐藏原生的select控件，支持select上设置change事件。

脚本

/*
* iSelect 
* 自定义select控件
*/
(function ($) {
    $.fn.iSelect = function (configs) {
        var configs = $.extend({}, $.fn.iSelect.defaults, configs || {});
        return this.each(function (index, element) {
            var myThis = this;
            var $this = $(this);
            
            var elId = $this.attr('name');
            if (elId == '' || typeof (elId) == 'undefined') {
                elId = 's00' + index;
                $this.attr('id', elId);
            }
            var $wrap = $('#iselect-' + elId);
            if ($wrap.length <= 0) {
                $wrap = $('<span class="iselect" id="iselect-' + elId + '"><div class="old"></div><div class="text"></div><div class="dropdown"><ul></ul></div></span>');
                $this.before($wrap);
                $this.prependTo($wrap.find('.old'));
            }
            var $text = $wrap.find('.text');
            var $dropdown = $wrap.find('.dropdown');
            var width = $this.width();
            var allwidth = configs.width;
            if (allwidth == 'auto') {
                allwidth =  width;
            }
            //$wrap.css({width:allwidth});
            $text.css({width:allwidth});
            $dropdown.css({width:allwidth + 2});
            var $list = $dropdown.find('ul');
            var html = '';
            var i = 0;
            var text = '';
            var value = '';
            var selected = false;
            var style = '';
            for (i = 0; i < myThis.options.length; i++) {
                text = myThis.options[i].text;
                value = myThis.options[i].value;
                selected = myThis.options[i].selected;
                if (selected) {
                    style = ' class="selected"';
                } else
                    style = '';
                html += '<li data-value="' + value + '"' + style + '><a href="javascript:;">' + text + '</a></li>';
            }
            $list.html(html);
            if (myThis.options.length>0) {
                text = myThis.options[myThis.selectedIndex].text;
                $text.html(text);
            }
            
            $dropdown.hide();
            $text.click(function (event) {
                event.stopPropagation();
                $dropdown.show();
            });
            $(document.body).click(function () {
                $dropdown.hide();
            });
            var $items = $list.find('li');
            $items.click(function (event) {
                var selectedIndex = $items.index($(this));
                myThis.options[selectedIndex].selected = true;
                $(myThis).change();
                $text.html(myThis.options[myThis.selectedIndex].text);
                $dropdown.hide();
            });
        });
    };
    $.fn.iSelect.defaults = {width:'auto'};
})(jQuery);

样式

.iselect { position:relative; display:inline-block; zoom:1; height:24px; line-height:24px; }
    .iselect .old { height:1px; overflow:hidden; }
    .iselect .text { height:24px; text-indent:5px; background:#fff url(images/iselect.png) no-repeat right center; border:solid 1px #d5d5d5; cursor:default; }
    .iselect .text:hover { border-color:#5999d0; background-image:url(images/iselect_hover.png); }
    .iselect .dropdown { position:absolute; left:0; top:27px; z-index:99; width:100%; height:auto; background:#fff;  }
    .iselect .dropdown ul { border:solid 1px #d5d5d5; max-height:360px; overflow:auto; }
    .iselect .dropdown li { cursor:pointer; }
    .iselect .dropdown li a { display:block; padding:0 5px;  }
    .iselect .dropdown li.selected a { background:#5999d0; color:#eee; }
    .iselect .dropdown a:hover { background:#eee; }

调用

$(function(){
    $('select').iSelect();
});

当前支持一个参数 width用来设置宽度，如果是动态更改下拉选项，在select上调用一次iSelect 即可