描述：前截条件字符串
查找：_anim.*$
替换：_anim

实例：
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/pages/frogbender_anim');"><img src="/images/pressnsplode/icon_frog.gif" alt="Frog in Blender"/></a> 
/pages/microgerbil_anim');"><img src="/images/pressnsplode/icon_gerbilmicrowave.gif" alt="Gerbil Microwave"/></a> 
/pages/livenletdive2_anim');"><img src="/images/pressnsplode/icon_live_dive2.gif" alt="Live and Let Dive 2"/></a> 

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/pages/frogbender_anim
/pages/microgerbil_anim
/pages/livenletdive2_anim

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