用Javascript转换源代码

源代码如下：

<textarea style="width:500;height:200" name="n1">
例子:
&lt;html&gt;
&lt;head&gt;
&lt;title&gt;无标题文档&lt;/title&gt;
&lt;meta http-equiv=&quot;C value="http://www.dedecms.com/web-art/htmlbase/Javascript/20020518/转换">

<script>

txt="";txt2="";txt3="";num=0
functi};if(txt3 == "&"){txt3="&amp;"};if(txt3 == "\""){txt3="&quot;"};if(txt3 == "<"){txt3="&lt;"};if(txt3 == ">"){txt3="&gt;"}
txt2=txt2+txt3
num++;if(num != txt.length){setTimeout("hh()",1)};else{document.all.n1.value=http://www.dedecms.com/web-art/htmlbase/Javascript/20020518/txt2}
}
</script>

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