function hint(id, param){
 var obj = this;
 obj.hint_container = document.getElementById(id);

 this.show = function(message) {

  obj.hint_container.innerHTML=message;

  document.onmousemove = function (e){

   var ie = document.all ? true : false;
   var x = ie ? document.body.scrollLeft + window.event.clientX : e.pageX;
   var y = ie ? document.body.scrollTop + window.event.clientY : e.pageY;

   obj.hint_container.style.left = document.body.clientWidth - x >= obj.hint_container.clientWidth ? x : x-obj.hint_container.clientWidth + 16 ;
   obj.hint_container.style.top = y+20; //document.body.clientHeight - y >= obj.hint_container.clientHeight ? y+20 : y-obj.hint_container.clientHeight - 16;
  }

  obj.hint_container.style.display='block';
 }

 this.hide = function() {
  obj.hint_container.innerHTML='';
  obj.hint_container.style.display='none';
 }

};

var hint = new hint('hintdiv');