jQuery实现根据类型自动显示和隐藏表单

<div class="control-group">
                    <label class="control-label">类型：</label>
                    <div class="controls control-row-auto" id="type">
                    </div>
                    <span class="auxiliary-text"></span>
                </div>
                <div class="control-group ctype ctype1 ctype2">
                    <label class="control-label">栏目模版：</label>
                    <div class="controls">
                        <select name="column_tpl" class="input">
                        </select>
                    </div>
                    <span class="auxiliary-text"></span>
                </div>
                <div class="control-group ctype ctype1">
                    <label class="control-label">文章模版：</label>
                    <div class="controls">
                        <select name="article_tpl" class="input">
                        </select>
                    </div>
                    <span class="auxiliary-text"></span>
                </div>
                <input type="hidden" name="tpl" id="tpl" value="" />
                <div class="control-group ctype ctype3" style="display: none;">
                    <label class="control-label"><s>*</s>栏目链接：</label>
                    <div class="controls">
                        <input name="url" type="text" class="input-large" data-rules="{required:true,minlength:1,maxlength:30}">
                    </div>
                    <span class="auxiliary-text">内部链接格式:模块/控制器/方法...,外部链接格式:http://../../</span>
                </div>

//根据类型自动显示和隐藏表单
            var input_type=$('input[name=type]');
            function typeChangeHandle(){
                var ctypes=$('.ctype');
                var type=$(this).val();
                var hideCtypes=ctypes.filter(':not(.ctype'+type+')').slideUp(500,function () {
                    $('.ctype'+type).slideDown(500);
                });
            }
            typeChangeHandle.apply(input_type);
            input_type.on('change',typeChangeHandle);
            input_type=null;