check.js

// I got tired of checking the webpage periodically.

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

page.onConsoleMessage = function(msg) {
  console.log(msg);
}

page.open('http://www.memoryexpress.com/Products/MX64875', function(status) {
// page.open('http://www.memoryexpress.com/Products/MX50991', function(status) {

  page.evaluate(function() {
    findStock = function() {
      // console.log('hi');
      var el = document.querySelector('#ProductInventory');
      var found = el.querySelectorAll('.Title');

      // found.forEach( function(e) {
      for( index=0; index < found.length; index++ ) {
        invEl = found[index];

        if (invEl.innerText == 'Edmonton Region') {
        // if (invEl.innerText == 'Calgary Region') {
          // console.log('found emd');
          var stock = invEl.parentElement.querySelectorAll('.Availability');
          if (stock.length) {
            var stockMessage = 'South - ' + stock[0].innerText + ': West - ' + stock[1].innerText;

            if (stockMessage === "South - Out of Stock: West - Out of Stock") {
              console.log(new Date() + ' |' + document.title + '| ' + stockMessage);
              setTimeout(findStock, 1000 * 60 * 5);
            } else {
              console.log('found stock');
              console.log(stockMessage);
            }

          } else {
            console.log('could not find stock');
          }
        }
      };
    }

    findStock();
  });
});