JavaScript标记不在Blogger上显示

Question

我正在尝试将JavaScript代码添加到我的博客页面...

<script language="javascript">
<!--
if (window.adgroupid == undefined) {
    window.adgroupid = Math.round(Math.random() * 1000);
}
document.write('<scr'+'ipt language="javascript1.1" src=" Date().getTime()+'"></scri'+'pt>');
//-->
</script><noscript><a href="" target="_blank"><img src="" border="0" width="1" height="1"></a></noscript>

...但是，所需广告未显示。