js下急求一个正则表达式！

Question

var s='01财务部#1#，22设备部#2#，武保部#3#，运输部#4#';
var reg=/#\d+(?=#)/g;
var m=s.match(reg);
m=m.join(',').replace(/#(?=\d+)/g,'');
alert(m);
类似这样试试

Answer 1

var s='01财务部#1#，22设备部#2#，武保部#3#，运输部#4#';
var a=[];
s.replace(/#(\d+)#/g,function ($_,$1){a.push($1)});
alert(a);

Answer 2

'01财务部#1#,22设备部#2#,武保部#3#,运输部#4#,'.replace(/([^#]+#{1})(\d+)(#{0,1})([,]{0,1})/g,"$2$4")

Answer 3

<script type="text/javascript">
var str="01财务部#1#，22设备部#2#，武保部#3#，运输部#4#";
var b = str.match(/#(\d+)#/g).join(",").replace(/#/g,"");
</script>