Deleting a File in JavaScript

I am attempting to check to see if a file exists in a child uploads directory from the parent directory the script is in however the script does not seem to want to create a new object. I run into an issue on var fso = new. Any suggestions?
How would I get this to work?
Is there a better or easier way to delete a file if it exists?
Thanks for any help.

<script language="JavaScript">
<!--
function delfile()
  {
   var readfile="<?php=$readfile?>";
   var fso = new ActiveXObject("Scripting.FileSystemObject");
   fileBool = fso.FileExists("uploads/" + readfile);
   if(fileBool)
     {
 document.write("Test-fileBool");
 fso.DeleteFile("uploads/" + readfile,true);
     }
  }
//-->
</script>

Code (markup):

 

Nevermind,

I asked in another forum and found out this is JScript, not JavaScript and it will only work in IE. That being the case, I am looking for a different method. It also uses ActiveX apparently and in IE7 there is a setting to turn ActiveX on or off.