代码如下： <!--脚本说明:第一步:把如下代码加入<body>区域中--> <SCRIPT LANGUAGE="JavaScript"> var x=9; var strobe="on" if (navigator.appName == "Netscape") { visShow="'show'"; visHide="'hide'"; docStyle="document."; styleDoc=""; } else { visHide="'hidden'"; visShow="'visible'"; docStyle=""; styleDoc=".style"; } </SCRIPT> <SCRIPT LANGUAGE="JavaScript"> function hide1() { eval(docStyle+ 'object1' + styleDoc + '.visibility=' + visHide); } function hide2() { eval(docStyle+ 'object2' + styleDoc + '.visibility=' + visHide); } function hide3() { eval(docStyle+ 'object3' + styleDoc + '.visibility=' + visHide); } function hide4() { eval(docStyle+ 'object4' + styleDoc + '.visibility=' + visHide); } function hide5() { eval(docStyle+ 'object5' + styleDoc + '.visibility=' + visHide); } function hide6() { eval(docStyle+ 'object6' + styleDoc + '.visibility=' + visHide); } function hide7() { eval(docStyle+ 'object7' + styleDoc + '.visibility=' + visHide); } function hide8() { eval(docStyle+ 'object8' + styleDoc + '.visibility=' + visHide); 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hide8(),hide10(); } function show10() { eval(docStyle+ 'object10' + styleDoc + '.visibility=' + visShow); hide9(); } function strobe1() { x+=1; eval("show" + x + "()"); if (x<10) setTimeout("strobe1()", 75); else if (strobe=="on") strobe2(); } function strobe2() { x-=1; eval("show" + x + "()"); if (x>1) setTimeout("strobe2()", 75); else strobe1(); } function strobeOn() { x=9; strobe="on"; strobe1(); } function strobeOff() { strobe="off"; } </SCRIPT> <div id="vis" style="position:absolute; visibility:show; left:175px; top:280px; z-index:1"> <table cellpadding=2 border=1><tr> <td><center><b>Strobe:</b></center></font></a></td> <td><a href="javascript:strobeOn()"> <font color="#000000"><center>on</center></font></a></td> <td><a href="javascript:strobeOff()"> <font color="#000000"><center>off</center></font></a></td> </tr></table></div> <div id="object1" style="position:absolute; visibility:hide; left:175px; top:300px; z-index:1"> <table border=1 bgcolor=#eaffff width=175 height=50><td><center><b><font color="#F9F9F9">JavaScript Planet</font></b></center></td></table> </div> <div id="object2" style="position:absolute; 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