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how to ignore comma’s and $ signs

hi, i am trying to edit a calculator to make it so that it ignores dollar signs and comma’s can somebody please help me quickly? thank you ?

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JavaScript

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@hyperliskMar 30.2006 — <i>
</i>&lt;script language="JavaScript"&gt;
function filterInput(input){
r = new RegExp("[\$|\,]","ig");
input = input.replace(r,"");
return input;
}
&lt;/script&gt;
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