gistfile1.js

$(function () {
    forge.logging.log("binding");
    $(".take-photo").bind("touchend", photo_button_click); 
});

function photo_button_click() {
    forge.file.getImage({}, function(file){
        forge.file.URL(file, 
                       function(url){
                           $("#image").html("<img src='"+url+"'></img>")
                       }, function() {});
    }, function(){});
}