图片素材：
最终效果图：
<html>
<title> 纯JS实现网页中多选复选框checkbox和单选radio的美化效果</title>
<head>
<style>
BODY {
FONT-FAMILY: "Segoe UI", Frutiger, Tahoma, Helvetica, "Helvetica Neue", Arial, sans-serif; FONT-SIZE:62.5%
}
LABEL {
MARGIN-RIGHT: 1.2em
}
.custom-checkbox {
POSITION: relative
}
.custom-radio {
POSITION: relative
}
.custom-checkbox INPUT {
POSITION: absolute; MARGIN: 0px; TOP: 2px; LEFT: 2px
}
.custom-checkbox LABEL {
POSITION: relative; PADDING-BOTTOM: 0.5em; LINE-HEIGHT: 1; MARGIN: 0px 0px 0.3em; PADDING-LEFT: 30px; PADDING-RIGHT: 0px; DISPLAY: block; FONT-SIZE: 1.3em; CURSOR: pointer; PADDING-TOP: 0.5em
}
.custom-checkbox LABEL {
BACKGROUND: url(./checkbox.gif) no-repeat
}
.custom-radio LABEL {
BACKGROUND: url(./radiobutton.gif) no-repeat
}
.custom-checkbox LABEL {
BACKGROUND-POSITION: -10px -14px
}
.custom-radio LABEL {
BACKGROUND-POSITION: -10px -14px
}
.custom-checkbox LABEL.hover {
BACKGROUND-POSITION: -10px -114px
}
.custom-checkbox LABEL.focus {
BACKGROUND-POSITION: -10px -114px
}
.custom-radio LABEL.hover {
BACKGROUND-POSITION: -10px -114px
}
.custom-radio LABEL.focus {
BACKGROUND-POSITION: -10px -114px
}
.custom-checkbox LABEL.checked {
BACKGROUND-POSITION: -10px -214px
}
.custom-radio LABEL.checked {
BACKGROUND-POSITION: -10px -214px
}
.custom-checkbox LABEL.checkedHover {
BACKGROUND-POSITION: -10px -314px
}
.custom-checkbox LABEL.checkedFocus {
BACKGROUND-POSITION: -10px -314px
}
.custom-checkbox LABEL.focus {
OUTLINE-STYLE: dotted; OUTLINE-COLOR: #ccc; OUTLINE-WIDTH: 1px
}
.custom-radio LABEL.focus {
OUTLINE-STYLE: dotted; OUTLINE-COLOR: #ccc; OUTLINE-WIDTH: 1px
}
.custom-radio INPUT {
POSITION: absolute; MARGIN: 0px; TOP: 2px; LEFT: 2px
}
.custom-radio LABEL {
POSITION: relative; PADDING-BOTTOM: 0.5em; LINE-HEIGHT: 1; MARGIN: 0px 0px 0.3em; PADDING-LEFT: 30px; PADDING-RIGHT: 0px; DISPLAY: block; FONT-SIZE: 1.3em; CURSOR: pointer; PADDING-TOP: 0.5em
}
</style>
</head>
<body>
<form action="#" method="post">
<input type="checkbox" name="genre" id="action" value="action"/>
<label for="action">答案一</label>
<input type="checkbox" name="genre" id="comedy" value="comedy"/>
<label for="comedy">答案二</label>
<input type="checkbox" name="genre" id="check-3" value="epic"/>
<label for="check-3">答案三</label>
<legend>小小球童是有史以来最伟大的电影，对不对？</legend>
<br>
<input type="radio" name="opinions" id="totally" value="totally"/>
<label for="totally">完全</label>
<input type="radio" name="opinions" id="no-way" value="no-way"/>
<label for="no-way">您一定是在开玩笑</label>
<input type="radio" name="opinions" id="whats-caddyshack" value="whats-caddyshack"/>
<label for="whats-caddyshack">小小球童是什么？</label>
</form>
<script>
/*
function hasClass(obj, cls)
{
return obj.className.match(new RegExp('(\s|^)' + cls + '(\s|$)'));
}
function addClass(obj, cls)
{
if (!this.hasClass(obj, cls)) obj.className += " " + cls;
}
function removeClass(obj, cls)
{
if (hasClass(obj, cls)) {
var reg = new RegExp('(\s|^)' + cls + '(\s|$)');
obj.className = obj.className.replace(reg, ' ');
}
}
function toggleClass(obj,cls)
{
if(hasClass(obj,cls)){
removeClass(obj, cls);
}else{
addClass(obj, cls);
}
}
function css(obj, attr, value)
{
//设置或获取Html元素中style属性集合中的每一个属性值
switch (arguments.length) {
case 2:
if (typeof arguments[1] == "object") { //批量设置属性
for (var i in attr) obj.style[i] = attr[i]
}
else { // 读取属性值
return obj.currentStyle ? obj.currentStyle[attr] : getComputedStyle(obj, null)[attr]
}
break;
case 3:
//设置属性
obj.style[attr] = value;
break;
default:
return "";
}
}
*/
function addClass(b,a){RegExp("(\s|^)"+a+"(\s|$)").test(b.className)||(b.className+=" "+a)}
function removeClass(b,a){b.className=b.className.replace(RegExp("(\s|^)"+a+"(\s|$)")," ")}
var HtmlWrapper = function(target,target2,html){
var wrap = html
if(Object.prototype.toString.call(html) === "[object String]")
{
if(document.createRange)
{
var frag = document.createDocumentFragment();
var div = document.createElement("div");
frag.appendChild(div);
div.innerHTML = html;
wrap=frag.firstChild.firstChild;
}else { //IE8
wrap = document.createElement(html);
}
}
target.parentNode.replaceChild(wrap,target);
wrap.appendChild(target);
wrap.appendChild(target2);
}
var lblArray=[];
var inputArray=[];
var checkBoxs=document.getElementsByTagName("input");
for(var i=0;i<checkBoxs.length;i++)
{
if("INPUT"==checkBoxs[i].tagName)
{
parents=checkBoxs[i].parentNode;//form
if (parents)
{
for(var j=0;j<parents.children.length;j++)
{
if(parents.children[j]==checkBoxs[i])
{
if(parents.children[j+1])
{
var olabel=parents.children[j+1];
var oinput=parents[i];
lblArray.push(olabel);
inputArray.push(oinput);
//在olabel和oinput外面包一层<div...>
HtmlWrapper(oinput,olabel,'<div class="custom-'+ oinput.getAttribute('type') +'"></div>');
//绑定事件
olabel.onmouseover=function(){
addClass(this,"hover");
}
olabel.onmouseout=function(){
removeClass(this,"hover");
}
oinput.onmouseover=function(){
for(var i=0;i<inputArray.length;i++)
{
if(this==inputArray[i])
{
addClass(lblArray[i],"hover");
}
}
}
oinput.onmouseout=function(){
for(var i=0;i<inputArray.length;i++)
{
if(this==inputArray[i])
{
removeClass(lblArray[i],"hover");
}
}
}
oinput.onclick=function(){
for(var i=0;i<inputArray.length;i++)
{
if(this==inputArray[i])
{
if(this.checked==true)
{
addClass(lblArray[i],"checked");
if(inputArray[i].type=="radio")
{
for(var k=0;k<inputArray.length;k++)
{
if (i!=k) {
inputArray[k].checked=false;
removeClass(lblArray[k],'checked');
}
}
}
}
else
{
removeClass(lblArray[i],'checked');
}
}
}
}
olabel.onclick=function(){
for(var i=0;i<lblArray.length;i++)
{
if (this==lblArray[i])
{
if(!inputArray[i].checked) //找到与当前label对应且紧前的<input>元素
{
inputArray[i].checked=false;
addClass(this,"checked");
if(inputArray[i].type=="radio")
{
for(var k=0;k<inputArray.length;k++)
{
if (i!=k) {
inputArray[k].checked=false;
removeClass(lblArray[k],'checked');
}
}
}
}
else
{
if(inputArray[i].type=="checkbox")
{
removeClass(this,'checked');
inputArray[i].checked=true;
}
}
break;
}
} //for i end
}
}
break;
}
}
}
}
}
</script>
</body>
</html>