Text to html

What is the most efficient way to convert text to html and then overwrite an existing html file with the generated html? My project at work consists of the following: I made a small application with auto-it that accomplishes some simple administrative tasks. My boss wants me to add the capability to modify an html file that is served by Apache, but he wants the ability to do this from within auto-it. Auto-it has the capability to display an embedded IE object from within a script, and i was thinking i could use javascript to build a lightweight text editor that would then save changes. The text would be very simple and only needs to be formatted as bold, have the ability to change between red or black font-color and have hyperlinks. Can anybody give me some suggestions on how to proceed? Can such a thing be accomplished using javascript? I ruled out PHP and Perl as my boss doesn't want the script to have any external dependencies, but it seems that for the javascript to write to the apache server it would obviously have to run something server side. What seems easier? Suggestions would be greatly appreciated. Obviously I am new at this.