Not sure what you are asking here. Are you saying that you have an HTML Form that accepts some sort of user input and that, on button click, you need to append this data to a file on the server? Also, by 'C', do you actually mean C or C#? If that is the case the answer is no, JavaScript can not do that. The best you can hope to accomplish is to create an XMLHTTP object and make an AJAX style request to some page that has the ability to write to the file system on the server.
hth
-Doug
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Doug Parsons
Wrox online library: Wrox Books 24 x 7
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"Easy is the path to wisdom for those not blinded by themselves."
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