trycss3_opacity_js 在线代码实例
<p id="p1">Select a value from the list below, to change this element's opacity!</p>
<select onchange="ChangeOpacity(this);" size="5">
<option>0
</option><option>0.2
</option><option>0.5
</option><option>0.8
</option><option selected="selected">1
</option></select>