由于某种原因，可能需要对单选框(radio)或复选框(checkbox)进行美化，那么直接修改样式是行不通，要实现就需要添加js，以下js依赖于jquery
radio.js:
function radAchk(dom,cls){
var self = this;
if(!cls){
cls = "input-skin";
}
dom.each(function(){
var $t = $(this);
self.addUI($t,cls);
$t.click(function(){
self.eventIE();
});
});
self.eventIE();
}
radAchk.prototype.addUI = function(dom,cls){
dom.after($('<span class="'+ cls +'"></span>'));
}
radAchk.prototype.eventIE = function(dom){
if(window.addEventListener){//判断是否是ie7\ie8
return false;
}
setTimeout(function(){
dom.filter(":checked").trigger('change.checkbox');
dom.filter(":disabled").parent().addClass("disabled");
});
dom.on("change.checkbox",function(){
dom.not(":checked").parent().removeClass("active");
$(this).parent().addClass("active");
});
}
;(function($){
$.fn.radAndchk = function(cls){//cls 皮肤class
new radAchk(this,cls);
}
})(jQuery);
美化单选框(input[type=radio]):
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>radio checkbox</title>
<style>
*{ margin:0; padding:0; }
.radio-p{ height:30px; line-height:30px; margin-left:10px; }
.js-radio-box{ position:relative; overflow:hidden; padding-left:25px; cursor:pointer; }
.js-radio-box input[type=radio]{ opacity:0; filter:alpha(opacity=0); position:absolute; left:0; z-index:2; }
.js-radio-box .radio-skin{ position:absolute; left:0; top:50%; margin-top:-7px; display:inline-block; background:url("img/icon.png") no-repeat; width:16px; height:16px; z-index:1; }
.js-radio-box:hover .radio-skin{ background-position:0 -20px; }
.js-radio-box input:disabled + .radio-skin,.js-radio-box.disabled .radio-skin{ background-position:0 -20px; cursor:default; }
.js-radio-box input:checked + .radio-skin,.js-radio-box.active .radio-skin{ background-position:0 -40px; }
</style>
<script src="js/jquery-1.8.2.min.js"></script>
</head>
<body>
<p class="radio-p"></p>
<p class="radio-p"><label class="js-radio-box"><input type="radio" checked="true" value="1" name="name1" class="radio1" />单选1</label></p>
<p class="radio-p"><label class="js-radio-box"><input type="radio" value="2" name="name1" />单选2</label></p>
<p class="radio-p"><label class="js-radio-box"><input type="radio" disabled="disabled" value="3" name="name1" />单选3</label></p>
<p class="radio-p"></p>
<p class="radio-p"><label class="js-radio-box"><input type="radio" value="12" name="name2" />单选12</label></p>
<p class="radio-p"><label class="js-radio-box"><input type="radio" disabled="true" value="13" name="name2" />单选13</label></p>
<script src="js/radio.js"></script>
<script>
$("input[type=radio]").radAndchk("radio-skin");//radio-skin 皮肤class
</script>
</body>
</html>
运行后，样式如下：
美化复选框(input[type=checkbox]):
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>checkbox checkbox</title>
<style>
*{ margin:0; padding:0; }
.checkbox-p{ height:30px; line-height:30px; margin-left:10px; }
.js-checkbox-box{ position:relative; overflow:hidden; padding-left:25px; cursor:pointer; }
.js-checkbox-box input[type=checkbox]{ opacity:0; filter:alpha(opacity=0); position:absolute; left:0; z-index:2; }
.js-checkbox-box .checkbox-skin{ position:absolute; left:0; top:50%; margin-top:-7px; display:inline-block; background:url("img/icon-chk.png") no-repeat; width:20px; height:16px; z-index:1; }
.js-checkbox-box:hover .checkbox-skin{ background-position:0 -40px; }
.js-checkbox-box input:disabled + .checkbox-skin,.js-checkbox-box.disabled .checkbox-skin{ background-position:0 -40px; cursor:default; }
.js-checkbox-box input:checked + .checkbox-skin,.js-checkbox-box.active .checkbox-skin{ background-position:0 -20px; }
</style>
<script src="js/jquery-1.8.2.min.js"></script>
</head>
<body>
<p class="checkbox-p"></p>
<p class="checkbox-p"><label class="js-checkbox-box"><input type="checkbox" checked="true" value="1" name="name1" class="checkbox1" />单选1</label></p>
<p class="checkbox-p"><label class="js-checkbox-box"><input type="checkbox" value="2" name="name1" />单选2</label></p>
<p class="checkbox-p"><label class="js-checkbox-box"><input type="checkbox" disabled="disabled" value="3" name="name1" />单选3</label></p>
<p class="checkbox-p"></p>
<p class="checkbox-p"><label class="js-checkbox-box"><input type="checkbox" value="12" name="name2" />单选12</label></p>
<p class="checkbox-p"><label class="js-checkbox-box"><input type="checkbox" disabled="true" value="13" name="name2" />单选13</label></p>
<script src="js/radio.js"></script>
<script>
$("input[type=checkbox]").radAndchk("checkbox-skin");//checkbox-skin 皮肤class
</script>
</body>
</html>
运行后，样式如下：
单选框或复选框的样式可以根据设计图修改。
这个js不影响原本的js方法，如要给radio添加click事件，可以直接：
$("input[type=radio]").click(function(){
……
});
也可以根据需要设置checked、disabled属性。
