var Geometry = {};

if (window.screenleft){
    Geometry.getWindowX = function(){return window.screenLeft;};
    Geometry.getWindowY = function(){return window.screenTop;};
}
else if (window.screenX){
    Geometry.getWindowX = function(){return window.screenX;};
    Geometry.getWindowY = function(){return window.screenY;};
}

if (window.innerWidth){
    Geometry.getViewportWidth = function(){return window.innerWidth;};    
    Geometry.getViewportHeight = function(){return window.innerHeight;};
    Geometry.getHorizontalScroll = function(){return window.pageXOffset;};
    Geometry.getVerticalScroll = function(){return window.pageYOffset;};
}
else if (document.documentElement && document.documentElement.clientWidth){
    Geometry.getViewportWidth = function(){return document.documentElement.clientWidth;};
    Geometry.getViewportHeight = function(){return document.documentElement.clientHeight;};
    Geometry.getHorizontalScroll = function(){return document.documentElement.scrollLeft;};
    Geometry.getVerticalScroll = function(){return document.documentElement.scrollTop;};
}
else if (document.body.clientWidth){
    Geometry.getViewportWidth = function(){return document.body.clientWidth;};
    Geometry.getViewportHeight = function(){return document.body.clientHeight;};
    Geometry.getHorizontalScroll = function(){return document.body.scrollLeft;};
    Geometry.getVerticalScroll = function(){return document.body.scrollTop;};
}

if (document.documentElement && document.documentElement.scrollWidth){
    Geometry.getDocumentWidth = function(){return document.documentElement.scrollWidth;};
    Geometry.getDocumentHeight = function(){return document.documentElement.scrollHeight;};
}
else if (document.body.scrollWidth){
    Geometry.getDocumentWidth = function(){return document.body.scrollWidth;};
    Geometry.getDocumentHeight = function(){return document.body.scrollHeight;};
}