Custom Validation Regular Expression (money)

I'm using a Custom Validation Control in ASP.NET and am trying to write the regular expression to recognize money. The entry may or may not contain $, it may or may not contain comma's, it may or may not include the cents(.##), and it must have at least one digit. So this is what I came up with (I have no previous regular expression experience and it will probably show)

\$?[0-9]+(\,[0-9]{3}]*(\.[0-9]{2})?

I'm trying to say
0 or more $ followed by
1 or more digits from 0 to 9 followed by
0 or 1 comma's followed by three digits from 0 - 9 followed by
0 or 1 period's followed by two digits

Its not recognizing anything that I try .... Any help is greatly appreciated.

Thanks.

RegExp( /^\$?(?:\d+|\d{1,3}(?:,\d{3})*)(?:\.\d{1,2}){0,1}$/ );


try this
das

Thanks. This worked too.

^\$?[0-9]+(,[0-9]{3})*(\.[0-9]{2})?$