phantomjs - render html does not work

phantomHtmlRender.js

"use strict";
function waitFor(testFx, onReady, timeOutMillis) {
    var maxtimeOutMillis = timeOutMillis ? timeOutMillis : 10000, //< Default Max Timout is 3s
        start = new Date().getTime(),
        condition = false,
        interval = setInterval(function() {
            if ( (new Date().getTime() - start < maxtimeOutMillis) && !condition ) {
                // If not time-out yet and condition not yet fulfilled
                condition = (typeof(testFx) === "string" ? eval(testFx) : testFx()); //< defensive code
            } else {
                if(!condition) {
                    // If condition still not fulfilled (timeout but condition is 'false')
                    console.log("'waitFor()' timeout");
                    phantom.exit(1);
                } else {
                    // Condition fulfilled (timeout and/or condition is 'true')
                    console.log("'waitFor()' finished in " + (new Date().getTime() - start) + "ms.");
                    typeof(onReady) === "string" ? eval(onReady) : onReady(); //< Do what it's supposed to do once the condition is fulfilled
                    clearInterval(interval); //< Stop this interval
                }
            }
        }, 250); //< repeat check every 250ms
};

var page = require('webpage').create();
var fs = require('fs');

// Open Twitter on 'sencha' profile and, onPageLoad, do...
page.open("http://www.abacoimaging.com", function (status) {
    // Check for page load success
    if (status !== "success") {
        console.log("Unable to access network");
    } else {
        // Wait for 'signin-dropdown' to be visible
        waitFor(function() {
            // Check in the page if a specific element is now visible
            return page.evaluate(function() {
            	var myStyle = document.getElementById("SITE_BACKGROUND") !== null;

                return myStyle ;
            });
        }, function() {
           console.log("Site should be visible now.");
           fs.write('abacoimaging.html', page.content, 'w');
           phantom.exit();
        });
    }
});