I need a simple function in node.js to write out a html page

General information for the business: i need a simple function in node.js to write out a html page
Description of requirements/functionality: The function will take in a name of existing html template page and insert new heading, sub heading, text, image and figcaps and write out a new html.

insertHtml('htmltemplate',{heading:text, section:text, subtitle:text, bodytext:text, figcaps: text},'newhtml')
append('currenthtml',{heading:text, section:text, subtitle:text, bodytext:text, figcaps: text})

for both functions, if a param is empty then just write params available, the append will need a callback in order that it can used in a loop, so waiting for write to complete or queue writes.

I current use webkit node js (NV) developer embeded chrome browser. This only to be used in a production enviroment and not by public
Specific technologies required: javascript
OS requirements: Windows
Extra notes: