急,请教各位大虾,怎么用正则表达式屏蔽下面的内容

[qqydao]

<anchor>加入收藏夹
<go method='post' href='mycol_do.asp'>
<postfield name='name' value='排行榜'/>
<postfield name='url' value='title.asp? Action=list&id=26&lid=33&page=1'/>
</go>
</anchor>

[xuStanly]

var str = "<anchor>加入收藏夹
<go method='post' href='mycol_do.asp'>
<postfield name='name' value='排行榜'/>
<postfield name='url' value='title.asp? Action=list&id=26&lid=33&page=1'/>
</go>
</anchor>"
str = str.replace(/<anchor>((?!<\/anchor>).*)<\/anchor>/ig, "");