Js动画（二）梦幻西游之逍遥生游览北俱芦洲

Common

  
   <
   script type
   =
   "
   text/javascript
   "
   >
   
 
   var
    Common 
   =
    {
 getElementPos: 
   function
   (el) {
 el 
   =
    
   this
   .getItself(el);
 
   var
    _x 
   =
    
   0
   , _y 
   =
    
   0
   ;
 
   do
    {
 _x 
   +=
    el.offsetLeft;
 _y 
   +=
    el.offsetTop;
 } 
   while
    (el 
   =
    el.offsetParent);
 
   return
    { x: _x, y: _y };
 },
 getItself: 
   function
   (id) {
 
   return
    
   "
   string
   "
    
   ==
    
   typeof
    id 
   ?
    document.getElementById(id) : id;
 },
 getMousePos: 
   function
   (ev) {
 ev 
   =
    ev 
   ||
    window.event;
 
   if
    (ev.pageX 
   ||
    ev.pageY) {
 
   return
    {
 x: ev.pageX,
 y: ev.pageY
 };
 }

 
   if
    (document.documentElement 
   &&
    document.documentElement.scrollTop) {
 
   return
    {
 x: ev.clientX 
   +
    document.documentElement.scrollLeft 
   -
    document.documentElement.clientLeft,
 y: ev.clientY 
   +
    document.documentElement.scrollTop 
   -
    document.documentElement.clientTop
 };
 }
 
   else
    
   if
    (document.body) {
 
   return
    {
 x: ev.clientX 
   +
    document.body.scrollLeft 
   -
    document.body.clientLeft,
 y: ev.clientY 
   +
    document.body.scrollTop 
   -
    document.body.clientTop
 };
 }
 }
 } 
 
   <
   /
   script>