兼容ipad的lazyload效果

  
  

   
   function
   
    lazyload(option){
 alert(
   
   "
   
   wwwwwwwwwwwwwwww
   
   "
   
   );
 
   
   var
   
    settings
   
   =
   
   {
 defObj:
   
   null
   
   ,
 defHeight:
   
   0
   
   
 };
 settings
   
   =
   
   $.extend(settings,option
   
   ||
   
   {});
 
   
   var
   
    defHeight
   
   =
   
   settings.defHeight,defObj
   
   =
   
   (
   
   typeof
   
    settings.defObj
   
   ==
   
   "
   
   object
   
   "
   
   )
   
   ?
   
   settings.defObj.find(
   
   "
   
   img
   
   "
   
   ):$(settings.defObj).find(
   
   "
   
   img
   
   "
   
   );
 
   
   var
   
    pageTop
   
   =
   
   function
   
   (){

 
   
   var
   
    ua 
   
   =
   
    navigator.userAgent.toLowerCase();
 
   
   if
   
   (ua.match(
   
   /
   
   iPad
   
   /
   
   i)
   
   ==
   
   "
   
   ipad
   
   "
   
   ) {
 
   
   return
   
    document.documentElement.clientHeight
   
   +
   
   window.pageYOffset
   
   -
   
   settings.defHeight;
 } 
   
   else
   
    {
 
   
   return
   
    document.documentElement.clientHeight 
   
   +
   
    Math.max(document.documentElement.scrollTop, document.body.scrollTop) 
   
   -
   
    settings.defHeight;
 }


 
 };
 
   
   var
   
    imgLoad
   
   =
   
   function
   
   (){
 defObj.each(
   
   function
   
   (){ 
 
   
   if
   
    ($(
   
   this
   
   ).offset().top
   
   <=
   
   pageTop()){
 
   
   var
   
    src2
   
   =
   
   $(
   
   this
   
   ).attr(
   
   "
   
   src2
   
   "
   
   );
 
   
   if
   
    (src2){
 $(
   
   this
   
   ).attr(
   
   "
   
   src
   
   "
   
   ,src2).removeAttr(
   
   "
   
   src2
   
   "
   
   );
 }
 }
 });
 };
 imgLoad();
 $(window).bind(
   
   "
   
   scroll
   
   "
   
   ,
   
   function
   
   (){ 
 imgLoad();
 });
}
lazyload({
 defObj:
   
   "
   
   #special1
   
   "
   
   
});
lazyload({
 defObj:
   
   "
   
   #special2
   
   "
   
   
});