I take it from the description the javascript is opening the text file containing the data, then processing line by line, filtering each result?

If you know enough PERL or PHP and are allowed to run scripts, I would suggest creating a server side script that opens the file and does the filtering for you, and passes the processed data to to the javascript. That way you can use the more comprehensive filtering abilities of PERL and leave the browser with less of a workload, and eliminate many client-side issues. In that case you would simply point the javascript to the new server side script.

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