我试图在浏览器中显示以下HTML页面。但它没有显示任何内容。
<HTML>
<HEAD>
<TITLE>Code Listing 19-4</TITLE>
<OBJECT ID="Seq1" CLASSID="CLSID:B0A6BAE2-AAF0-11D0-A152-00A0C908DB96">
</OBJECT>
<SCRIPT LANGUAGE="JavaScript">
Seq1.Item("ActionSet1").At(0.000,"showText(`3')",1,0.050,1);
Seq1.Item("ActionSet1").At(1.000,"showText(`2')",1,0.050,1);
Seq1.Item("ActionSet1").At(2.000,"showText(`1')",1,0.050,1);
Seq1.Item("ActionSet1").At(3.000,"showText(`Ta Da!')",1,0.050,1);
function showText(obj){ Span1.innerHTML=obj }
</SCRIPT>
</HEAD>
<BODY onload="Seq1.Item(`ActionSet1').Play()">
<CENTER>
<SPAN ID="Span1" STYLE="font:48pt bold arial;color:red"></SPAN>
</CENTER>
</BODY>
</HTML>
任何人都知道确切的问题是什么？