javascript - how to match all special characters except a comma

What's the regex values for to match a string against all special characters and letters except a comma.

value = "23,$%aA";

I want to do a match if the value has any pf the special characters and letters like the above string then it will return true but if it just has a value like

value = "23,3456.00"

then it will return false. As all the special characters and letters are no longer part of the string.

Can I do this using match and regex.

Answer

This will match everything that is not numeric or not a comma or period (decimal point)

var result = str.replace(/[^0-9\.,]/g, "");