Having trouble with javascript Replace()

This code will replace the comma's no problem, but will leave the $ for some reason... Is it set开发者_JAVA技巧 up wrong? Trying to replace the $ also.

function doValidate() { 
    var valid = true;  
    document.likeItemSearchForm.sup.value = document.likeItemSearchForm.sup.value.replace(/\$|,/g, "")  
    return valid;   
}

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Try this:

'asd$asd,asd,asd$,asd'.replace(/[\$,]/g,'');

JSFIDDLE -edit- fixed link

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try this:

"$12,121.30".replace(/[\$,]/g, "");