JS嵌套有什么语法错误？在线等！
菜鸟自学做网站。
原来网页有段代码AAAA，调用GOOGLE   ADSENSE的JS代码。
现在需要把代码AAAA写成JS，那么就出现了JS里面调用GOOGLE   ADSENSE的JS代码的问题。
因此显示不正确。
显示结果：

请高手们指正！


原来AAA代码如下：
<TR>
<TD   height=60   width=168   vAlign=bottom> 123 </TD>
<TD   height=60   width=510   vAlign=bottom   align=center>
<script   type= "text/javascript "> <!--
google_ad_client   =   "pub-9419450997426427 ";
google_ad_width   =   468;
google_ad_height   =   60;
google_ad_format   =   "468x60_as ";
google_ad_type   =   "image ";
google_ad_channel   =   " ";
//--> </script>
<script   type= "text/javascript "
    src= "http://pagead2.googlesyndication.com/pagead/show_ads.js ">
</script> </TD>
<TD   height=60   width=100   vAlign=bottom   align=right> 456 </TD>
</TR>


AAAA转换后的JS代码如下：
document.writeln( " <TR> ");
document.writeln( " <TD   height=60   width=168   vAlign=bottom> 123 <\/TD> ");
document.writeln( " <TD   height=60   width=508   vAlign=bottom   align=center> ");
document.writeln( " <script   type=\ "text\/javascript\ "> <!-- ");
document.writeln( "google_ad_client   =   \ "pub-9419450997426427\ "; ");
document.writeln( "google_ad_width   =   468; ");
document.writeln( "google_ad_height   =   60; ");
document.writeln( "google_ad_format   =   \ "468x60_as\ "; ");
document.writeln( "google_ad_type   =   \ "image\ "; ");
document.writeln( "google_ad_channel   =   \ "\ "; ");
document.writeln( "\/\/--> <\/script> ");
document.writeln( " <script   type=\ "text\/javascript\ " ");
document.writeln( "     src=\ "http:\/\/pagead2.googlesyndication.com\/pagead\/show_ads.js\ "> ");
document.writeln( " <\/script> <\/TD> ");
document.writeln( " <TD   height=60   width=100   vAlign=bottom   align=right> 456 <\/TD> <\/TR> ");

------解决方案--------------------
需要这么做么？看不到这样做的意义所在。
------解决方案--------------------
注意单双引号
document.writeln( 'src=\ "http:\/\/pagead2.googlesyndication.com\/pagead\/show_ads.js\ "> ')
document.writeln( ' <\/script> <\/TD> ');
document.writeln( ' <TD height=60 width=100 vAlign=bottom align=right> 456 <\/TD> <\/TR> ');
------解决方案--------------------
把最后一句单独写在一个 <script> </script> 里