Phaser.DOM = { 
getOffset: function (element, point){ 
point = point || new Phaser.Point(); 
var box = element.getBoundingClientRect(); 
var scrollTop = Phaser.DOM.scrollY; 
var scrollLeft = Phaser.DOM.scrollX; 
var clientTop = document.documentElement.clientTop; 
var clientLeft = document.documentElement.clientLeft; 
point.x = box.left + scrollLeft - clientLeft; 
point.y = box.top + scrollTop - clientTop; 
return point; 
} 
}
; 
Phaser.Device.whenReady(function (device){ 
var scrollX = window && ('pageXOffset' in window)? function (){ 
return window.pageXOffset; 
} 
: function (){ 
return document.documentElement.scrollLeft; 
} 
; 
var scrollY = window && ('pageYOffset' in window)? function (){ 
return window.pageYOffset; 
} 
: function (){ 
return document.documentElement.scrollTop; 
} 
; 
Object.defineProperty(Phaser.DOM, "scrollX", { 
get: scrollX}
); 
Object.defineProperty(Phaser.DOM, "scrollY", { 
get: scrollY}
); 
} 
, null , true );