Java Script Error - while recording with Truclient FF and TruClient IE

1 ) When I am trying to record Truclient Script with Firefox following java script error is displayed in Firebug console.

Error: ActiveXObject is not defined --in Audit.JS Line 12.
when I looked at line 12 in Audit.JS --following code is present.
var xmlObj = new ActiveXObject("Microsoft.XmlDom") ;

So I am guessing above error is due to Microsoft xml dom object is not compatible with firefox. Please correct me If I am wrong.

2) When same script recorded with Truclient IE, I am getting following error in IE console.

Error: (Code=0) Object doesn't support property or method 'Open';
Line: 27; Character: 5; Audit.JS
When I looked at Audit.JS, following code is present.
Line 26 - var xmlHTTP = new ActiveXObject("Microsoft.XMLHTTP") ;
Line 27 - xmlHTTP.Open("Post", "" + scriptDepth + "/WebServices/AuditWebService.asmx", false) ;

Please suggest how can I fix this java script error.