AS3 URL Request file not found

Question

Hi
I just learned last night from Ned Murphy how to code a btn in AS3.
Trouble is, when testing the Dreamweaver frameset website, site name: URLRequest on the C drive with my default browser F12, I get a problem loading the page / file not found.
Here is the btn AS3 code.
btn1.addEventListener(MouseEvent.CLICK, btn1Click);
function btn1Click(evt:MouseEvent):void {
   var url:String = "C:\WebSites\FrameSets\URLRequest\mainFrame1.html";
   var req:URLRequest = new URLRequest(url);
   navigateToURL(req);
Just for comparison here is the AS3 btn code Ned copy pasted to my Thread last night.
btn1.addEventListener(MouseEvent.CLICK, btn1Click);
function btn1Click(evt:MouseEvent):void {
   var url:String = "http://www.awebsite.com/awebpage.html";
   var req:URLRequest = new URLRequest(url);
   navigateToURL(req);
What is it that is stopping my browser from directing to "C:\WebSites\FrameSets\URLRequest\mainFrame1.html";
Is it the var url:String?
Thanks for reading
Sabby76

Answer 1

Re Kglad Thank you
I copy pasted the URL into a browser and it junked to: file:///C:/WebSites/FrameSets/URLRequest,mainFrame1.html I don't know what is the correct name for file:/// probably just the O.S directories proxy? Using the file:///  in the btns function out-works perfectly. Now the rest of the websites frame set extensions directories will not pull up after the index for example: file:///C:/WebSites/FrameSets/URLRequest/index.html/mainFrame2.html I think a re-thread in the DW forum will be the next step, any clues?
Cheers
Sabby76