// JavaScript Document

                    
                    var pop = document.getElementById('popup');
                    
                    var xoffset = -160;
                    var yoffset = -40;
                    
                    document.onmousemove = function(e) {
                      var x, y, right, bottom;
                      
                      try { x = e.pageX; y = e.pageY; } // FF
                      catch(e) { x = event.x; y = event.y; } // IE
                    
                      right = (document.documentElement.clientWidth || document.body.clientWidth || document.body.scrollWidth);
                      bottom = (window.scrollY || document.documentElement.scrollTop || document.body.scrollTop) + (window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight || document.body.scrollHeight);
                    
                      x += xoffset;
                      y += yoffset;
                    
                      if(x > right-pop.offsetWidth)
                        x = right-pop.offsetWidth;
                     
                      if(y > bottom-pop.offsetHeight)
                        y = bottom-pop.offsetHeight;
                      
                      pop.style.top = y+'px';
                      pop.style.left = x+'px';
                    
                    }
                    
                    function popup(text) {
                      pop.innerHTML = text;
                      pop.style.display = 'block';
                    }
                    
                    function popout() {
                      pop.style.display = 'none';
                    }