Export iOS Retina Graphic.jsf

var dom = fw.getDocumentDOM();

function exportRetina()
{
    // delete all other pages
    while (fw.getDocumentDOM().pagesCount > 1) {
        fw.getDocumentDOM().deletePageAt(1);
    }

    var width = dom.width;
    var height = dom.height;

    // duplicate, resize & rename
    dom.duplicatePage(0);
    dom.changeCurrentPage(1);
    dom.setDocumentImageSize({left:0, top:0, right:width/2, bottom:height/2}, {pixelsPerUnit:72, units:'inch'}, true, -1);
    dom.setPageName(1, dom.pageName.substring(0, dom.pageName.length - 3));

    dom.changeCurrentPage(0);

    fw.exportDocumentAs(null, null, null);
}

if (dom.pageName.substring(dom.pageName.length - 3) != "@2x") 
{
    // TODO: check all pages for name

    if(confirm('Error: High-res page name must end in @2x\n\nAppend "@2x" to current page name?'))
    {
        // TODO: not hardcode page name here
        dom.setPageName(0, dom.pageName + "@2x");

        exportRetina();
    }
}
else 
{
    exportRetina();
}