You need to change this:
var pt_sage = new array();
To this:
var pt_sage = new Array();
Better yet, change it all to:
var pt_sage = ["some text based on background", "some more text based on background"];
You need to change this:
var pt_sage = new array();
To this:
var pt_sage = new Array();
Better yet, change it all to:
var pt_sage = ["some text based on background", "some more text based on background"];