pasteCatcher = document.createElement("div");
        pasteCatcher.setAttribute("id", "paste_ff");
        pasteCatcher.setAttribute("contenteditable", "");
        pasteCatcher.style.cssText = 'opacity:0;position:fixed;top:0px;left:0px;';
        pasteCatcher.style.marginLeft = "-20px";
        document.body.appendChild(pasteCatcher);
        document.getElementById('paste_ff').addEventListener('DOMSubtreeModified',function()
        {
            if(pasteCatcher.children.length == 1)
            {
                var img = pasteCatcher.firstElementChild.src;

                var img2 = new Image();
                img2.onload = function()
                {
                    new_whiteboard.paste_image(img2);
                }
                img2.src = img;
                pasteCatcher.innerHTML = '';
            }
        },false);