<div id="ob2" style="position:absolute;left:-20;top:-20;z-index:8"> <font size="+3" color="#0000ff"><b>.</b></font></div>
<div id="ob3" style="position:absolute;left:-20;top:-20;z-index:8"> <font size="+3" color="#0000ff"><b>.</b></font></div>
<div id="ob4" style="position:absolute;left:-20;top:-20;z-index:8"> <font size="+3" color="#0000ff"><b>.</b></font></div>
<div id="ob5" style="position:absolute;left:-20;top:-20;z-index:8"> <font size="+3" color="#0000ff"><b>.</b></font></div>
<div id="ob6" style="position:absolute;left:-20;top:-20;z-index:7"> <font size="+3" color="#00ffff"><b>.</b></font></div>
<div id="ob7" style="position:absolute;left:-20;top:-20;z-index:7"> <font size="+3" color="#00ffff"><b>.</b></font></div>
<div id="ob8" style="position:absolute;left:-20;top:-20;z-index:7"> <font size="+3" color="#00ffff"><b>.</b></font></div>
<div id="ob9" style="position:absolute;left:-20;top:-20;z-index:7"> <font size="+3" color="#00ffff"><b>.</b></font></div>
<div id="ob10" style="position:absolute;left:-20;top:-20;z-index:6"> <font size="+3" color="#f30000"><b>.</b></font></div>
<div id="ob11" style="position:absolute;left:-20;top:-20;z-index:6"> <font size="+3" color="#f30000"><b>.</b></font></div>
<div id="ob12" style="position:absolute;left:-20;top:-20;z-index:6"> <font size="+3" color="#f30000"><b>.</b></font></div>
第三步：把<body>中内容改为：
