1、打开软件，如下图所示；
4、在样式里面写如下代码；<style type="text/css">#h{ opacity:0.55; filter:alpha(opacity=55);}#bac{ width:500px; height:300px; background:red; position:absolute; top:0; left:0; opacity:0.5; filter:alpha(opacity=55);}h1{ position:absolute; top:110px; left:90px;}#red{ float:right; background:red; width:500px; height:300px;}h2{ position:absolute; top:110px; left:1220px;}</style>
5、运行结果如下，对比；
