Javascript Code

Hello, I would like a script written in javascript which would allow me to edit the current html file from where the script was run. So for example if i have a page named: [login to view URL] Javascipt code written in the [login to view URL] file would look like: <script language="javascript"> function EditThis( command, id, text ) { //There are 2 possible commands 1. Add - which would add the new text to the html file 2. Remove - which would remove the specified text from the html file //The id is the location in the html file example: <div id="mainmenu"> </div> //The text is the text to add/remove under the id } </script> \*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\*\* So if the code would be: javascript:EditThis("Add", "mainmenu", "<a href='#'>Home</a>"); <div id="mainmenu"> </div> The Result Should be: <div id="mainmenu"> <a href='#'>Home</a> </div> \*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\\*\*\*|\*\* I hope this makes sense and please let me know if not. Thank you Paul