关于document.write()输出

怎么将下列代码插入到页面底部中间，请给出具体代码：

document.write(unescape("%3Cspan id='_ideConac' %3E%3C/span%3E%3Cscript src='http://dcs.conac.cn/js/14/221/0793/41411133/CA142210793414111330001.js' type='text/javascript'%3E%3C/script%3E"));

保存为一个js文件，然后script加载就行了，或者直接script中间放你的代码，你要在那里输出内容就直接将script放入那块中

 <div id="foot">
<script src="你那个代码的js路径"></script>
或者
<script >
unescape("%3Cspan id='_ideConac' %3E%3C/span%3E%3Cscript src='http://dcs.conac.cn/js/14/221/0793/41411133/CA142210793414111330001.js' type='text/javascript'%3E%3C/script%3E")</script>
</div>