Help splitting a string up

I have a a Javascript variable that is coming back with a special delimited string.  (It's how SharePoint stores multiple values).

I'm initializing my Javascript variable like this:

var sponsor=$(this).attr("ows_Sponsor");
if(sponsor==null)
sponsor='';

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My values are coming back like these.

;#SG3;#ACC;#

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or

;#SG3;#ACC;#AETC;#

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How can I spit the strings up so they look more like this?

SG3,ACC

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or

SG3,ACC,AETC

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Thank you.