若页面源代码头部中被添加了以下广告，请问如何去除？（遮盖是知道嘎）
<P><div align="center"></P><P> </P><P> </P><P><script type="text/javascript"><!--<BR>google_ad_client = "pub-3707770749458083";<BR>google_ad_width = 728;<BR>google_ad_height = 90;<BR>google_ad_format = "728x90_as";<BR>google_ad_type = "text_image";<BR>google_ad_channel ="2387288256";<BR>google_color_border = "336699";<BR>google_color_bg = "FFFFFF";<BR>google_color_link = "0000FF";<BR>google_color_url = "008000";<BR>google_color_text = "000000";<BR>//--></script><BR><script type="text/javascript"<BR> src="<A href="http://pagead2.googlesyndication.com/pagead/show_ads.js">http://pagead2.googlesyndication.com/pagead/show_ads.js</A>"><BR></script></P>页:
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