基于jquery自定义的漂亮单选按钮RadioButton

<div style="margin:50px;float:left;">
<b class="radio" _txt="单选我"></b>
<b class="radio" _txt="单选你"></b>
<b class="radio" _txt="单选他"></b>
</div>

.radio{float:left;background:url(/img/Icon_BG.png);}
.radio{width:14px;height:14px;background-position:0px -58px;cursor:pointer;font-size:9px;}
.radio.checked{background-position: -15px -58px;}
.radio_txt{float:left;margin:0px 0 0 10px;cursor:pointer;line-height:14px;font-size:12px;}
.radio_txt .radio{margin-right:5px;}

//单选项
var RadioButton = function () {
this.obj;
var _this = this, _obj;
//初始化
this.init = function () {
_obj = _this.obj;
var tem = _obj.length > 1 ? _obj.eq(0) : _obj;
if (tem.attr('class').indexOf('radio') == -1) {
showMessage("控件属性设置有误：部分控件并不是单选项！");
return;
}
//单选事件
var click_fun = function (obj) {
if (obj.parent().attr('class') == 'radio_txt') {
obj.parent().parent().find('.radio_txt .radio').removeClass('checked');
} else
obj.siblings('.radio').removeClass('checked');
obj.addClass('checked');
_this.click_callback();
};

//设置有文字单选项
if (_obj.attr('_txt') != undefined) {
_obj.each(function (i) {
var radio = _obj.eq(i);
radio.wrapAll('<font class="radio_txt"></font>');
//文本单击事件
radio.parent().append(radio.attr('_txt')).click(function () { click_fun(radio); });
});
} else//对象点击事件
_obj.unbind('click').click(function () { click_fun($(this)); });
}
//点击回调事件
this.click_callback = function () { }
}

//初始化单选框
var radio = new RadioButton();
radio.obj = $('.radio');
radio.init();