Incrementing a page number?

Hey,

I need to be able to click on my previous and next buttons to navigate between different html pages. These pages will have the naming convention 'Page 1.html'...'Page 2.html'. I want to be able to know what page I am on and then the next/previous button will increment the current page by 1.

So for example in Page 1.html:

My stage code

//create variable which holds current page number

sym.setVariable("page", 1);

Next Button OnClick Code

//Get page variable

var page = sym.getVariable("page");

//Open next page and increment by 1

window.open("Layout " + (page + 1) + ".html", "_self"); *This is the peice of code Im trying to get working!

Can anyone help me on how to add a variable number into the URL?

Thanks for any help!