<img src="http://cn.yimg.com/i/comn/lg07/ylgfanyi.gif" width=200 height=44 style='filter:blur(add=1,direction=14,strength=15)'>
str = str.replace(/\[img=(\d*)(,)(\d*)(,)(filter

([^\[]*)\]([^\[]*)\[\/img\]/ig,' <img src="$7" border="0" width="$1" height="$3" style="$5$6"/>');
大虾看看这个正则还能精简不???