Add Page Links with LiveCycle Designer

To set the page use:

xfa.host.currentPage = 5; // To go to page 5

If it is a dynamic PDF then the page number is not always obvious. You need to identify an object on the page first, then you can get the page number the object is on. For example if the main object for the help page is "Help1":

var oHelpPage = xfa.form.resolveNode("$..Help1");
var nPage = xfa.layout.absPage(oHelpPage);
xfa.host.currentPage = nPage;