基于jquery扩展漂亮的下拉框可以二次修改

<b class="select_type"></b>

.dropdown span a{float:left;background:url(/img/Icon_BG.png);}
/*下拉框 http://power.76741.com*/
.dropdown span a{background-position: -213px -75px;}
.dropdown{float:left;width:105px;}
.dropdown span{border:solid 1px #ccc;width:95%;height:28px;background:url(/img/tbline_bg.png);border-radius:8px;overflow:hidden;}
.dropdown span{float:left;padding-left:10px;line-height:28px; cursor:pointer;}
.dropdown span.active{border-radius:8px 8px 0px 0px;}
.dropdown span font{width:auto;margin-right: 0px;float:left;}
.dropdown span a{float:right;width:20px;height:20px;margin:4px 0;}
.dropdown p{border:solid 1px #ccc;border-top:0px;width:103px;display:none;position:absolute;margin-top:28px;background-color:#fff;z-index:3;max-height:280px;overflow-y: auto; overflow-x: hidden;}
.dropdown p a{float:left;line-height:28px;height:28px;padding-left:10px;color:#666;font-size:14px;cursor:default;text-align:left;width:100%;overflow:hidden;}
.dropdown p a:hover{background:url(/img/tbline_bg.png);color:#666;}

//下拉框
var ComboBox = function () {
this.tag;
this.data_default;
this.data_list;
this.index = 0;

var _this = this;
var _index, _tag, _value;
//初始化
this.init = function () {
_tag = _this.tag;
_index = _this.index;
//设置对象
_this.setDropdown(_this.data_default, _this.data_list);
//赋值绑定事件
if (_tag.find('span font').length > 0) _value = _tag.find('span font').attr('_id');
if (_tag == undefined) { return false; }
_this.showEvent();
_this.selectedIndex(_index);
return true;
}
//设置下拉列表
this.setDropdown = function (default_data, list) {
var css = _tag.attr('class');
if (default_data == undefined) {
default_data = { id: 'null', name: '' };
}
var _html = '';
if (_tag.find('p').length > 0 && _tag.find('span').length > 0) {
$.each(list, function (i, value) {
_html += '<a _id="' + value.id + '">' + value.name + '</a>';
});
_tag.find('span font').replaceWith('<font _id="' + default_data.id + '">' + default_data.name + '</font>');
_tag.find('p').html(_html);
} else {
_html = '<div class="dropdown ' + css + '">';
_html += '<span><font _id="' + default_data.id + '">' + default_data.name + '</font><a></a></span>';
_html += '<p>';
if (list) {
$.each(list, function (i, value) {
_html += '<a _id="' + value.id + '">' + value.name + '</a>';
});
}
_html += '</p>';
_html += '</div>';
var parent = _tag.parent();
_tag.replaceWith(_html);
_tag = parent.find('.dropdown' + (css.length > 0 ? '.' + css.replace(' ', '.') : ''));
}
}
//下拉事件
this.showEvent = function () {
_tag.find('span').unbind('click').click(function () {
var p = $(this).parent().find('p');
if (p.css('display') == 'block') {
p.css('display', 'none');
$(this).removeClass('active');
} else if (p.html().length > 0) {
p.css('display', 'block');
$(this).addClass('active');
}
});
}
//选中事件
this.selectedIndex = function (index) {
_tag.find('p a').unbind('click').click(function () {
var parent = $(this).parent().parent();
//给下拉框赋值
if ($(this).text().length > 0) {
var font = parent.find('font');
font.text($(this).text());
font.attr("_id", $(this).attr('_id'));
_this.selectedIndexExpand(parent, $(this).index());
parent.find('span').removeClass('active');
}
parent.find('p').css('display', 'none');
});
if (_tag.find('p a').length <= _index) _index = 0;
if (_value && _value != '') {
_index = _tag.find('p a[_id="' + _value + '"]').index();
}
_tag.find('p a:eq(' + _index + ')').click();
}
//选中事件扩展
this.selectedIndexExpand = function (tag, index) { }
}

//http://www.naoqiu.com
var array_state = [{ id: -1, name: '状态' }, { id: 1, name: '未成功' }, { id: 2, name: '成功' }, { id: 3, name: '失败'}];
//状态下拉控件
var select_type = new ComboBox();
select_type.tag = $('.select_type');
select_type.data_default = array_state[0];
select_type.data_list = array_state;
select_type.selectedIndexExpand = function (tag, index) {
//fun_Pager();
}
select_type.init();