Help with save as (tiff compression options) javascript

Hi can someone please help me alter this script from 'psd' to 'tiff'. I would like the script to specify particular compression options and I'm not sure how.

     var saveFile = new File('~/desktop/'+(new Date().getTime().toString())+'.psd');
      app.activeDocument.saveAs(saveFile);
      app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);

The compression options I would like are as follows

Tiff (8bit)

Image Compression - JPEGG Quality 10

Layer Compression - ZIP