var getMouseXY = function(){

        names = [
                 'clientX','clientY',
                 'offsetX','offsetY',
                 'screenX','screenY',
                 'x',      'y'
                ];

        for(var x=0; x<names.length; x++){
          name   = names[x];
          domRef = document.getElementById(name);
          domRef.innerHTML = window.event[name];
        }

      }

      window.onload=function(){
        document.body.onmousemove=getMouseXY;
      }