HTML代码：
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<input type="radio" class="radio" name="progress" value="five" id="five">
<label for="five" class="label">5%</label>
<input type="radio" class="radio" name="progress" value="twentyfive" id="twentyfive" checked>
<label for="twentyfive" class="label">25%</label>
<input type="radio" class="radio" name="progress" value="fifty" id="fifty">
<label for="fifty" class="label">50%</label>
<input type="radio" class="radio" name="progress" value="seventyfive" id="seventyfive">
<label for="seventyfive" class="label">75%</label>
<input type="radio" class="radio" name="progress" value="onehundred" id="onehundred">
<label for="onehundred" class="label">100%</label>
<p class="progress">
<p class="progress-bar"></p>
</p>
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主要由两部分，一部分是选择进度的按钮，点击按钮即会让进度条跳转到相应进度的位置并显示对应的背景颜色。
还有一部分HTML则是进度条的容器，进度条就在这个容器中发生各种变化。
CSS3代码：
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.container {
margin: 80px auto;
width: 640px;
text-align: center;
}
.container .progress {
margin: 0 auto;
width: 400px;
}
.progress {
padding: 4px;
background: rgba(0, 0, 0, 0.25);
border-radius: 6px;
-webkit-box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.25), 0 1px rgba(255, 255, 255, 0.08);
box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.25), 0 1px rgba(255, 255, 255, 0.08);
}
.progress-bar {
position: relative;
height: 16px;
border-radius: 4px;
-webkit-transition: 0.4s linear;
-moz-transition: 0.4s linear;
-o-transition: 0.4s linear;
transition: 0.4s linear;
-webkit-transition-property: width, background-color;
-moz-transition-property: width, background-color;
-o-transition-property: width, background-color;
transition-property: width, background-color;
-webkit-box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.25), inset 0 1px rgba(255, 255, 255, 0.1);
box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.25), inset 0 1px rgba(255, 255, 255, 0.1);
}
.progress-bar:before, .progress-bar:after {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
}
.progress-bar:before {
bottom: 0;
background: url("../img/stripes.png") 0 0 repeat;
border-radius: 4px 4px 0 0;
}
.progress-bar:after {
z-index: 2;
bottom: 45%;
border-radius: 4px;
background-image: -webkit-linear-gradient(top, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.05));
background-image: -moz-linear-gradient(top, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.05));
background-image: -o-linear-gradient(top, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.05));
background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.05));
}
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上面的CSS代码是对进度条的样式进行定义，并采用渐变的CSS3属性来让进度条的背景颜色更加时尚。
接下来是关键的按钮选择进度的CSS代码：
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#five:checked ~ .progress > .progress-bar {
width: 5%;
background-color: #f63a0f;
}
#twentyfive:checked ~ .progress > .progress-bar {
width: 25%;
background-color: #f27011;
}
#fifty:checked ~ .progress > .progress-bar {
width: 50%;
background-color: #f2b01e;
}
#seventyfive:checked ~ .progress > .progress-bar {
width: 75%;
background-color: #f2d31b;
}
#onehundred:checked ~ .progress > .progress-bar {
width: 100%;
background-color: #86e01e;
}
.radio {
display: none;
}
.label {
display: inline-block;
margin: 0 5px 20px;
padding: 3px 8px;
color: #aaa;
text-shadow: 0 1px black;
border-radius: 3px;
cursor: pointer;
}
.radio:checked + .label {
color: white;
background: rgba(0, 0, 0, 0.25);
}
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用上面的CSS3代码就可以取代js来实现点击选中的事件，非常方便。
