The problem is that your page 1 is loading the JavaScript file and your page 2 is loading it again therefore whatever you have set in a variable on that JS file will be lost when page 2 is loaded since page 2 will initialize again the JS file. If you want you can use cookie to store the value or if it simple to you combine page 1 and page 2 but put them in a different div and show/hide the div according to your logic.
