问题描述：
请告诉指导正则表达式,获取第2个逗号与第3个逗号之间的内容
sfdsfds,343fds,ewew,343fds,
sfdsfds,343fds,ewew,343fds,
问题解答：
我来补答
var matches = "sfdsfds,343fds,ewew,343fds,".match( /,[^,]*,([^\,]*)/ );
alert( matches ? matches[1] : 'no matches!' )
alert( matches ? matches[1] : 'no matches!' )
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