jquery实现的瀑布流代码实例

function lazyload(option){
 var settings = {
  defObj: null,
  defHeight: 0
 };
 settings = $.extend(settings, option || {});
 var defHeight = settings.defHeight;
 var defObj = (typeof settings.defObj == "object") ? settings.defObj.find("img") : $(settings.defObj).find("img");
 var pageTop = function() {
   return document.documentElement.clientHeight + Math.max(document.documentElement.scrollTop, document.body.scrollTop) - settings.defHeight;
 };
 var imgLoad = function() {
   defObj.each(function() {
   if($(this).offset().top <= pageTop()){
      var src2 = $(this).attr("src2");
      //已显示的不用再显示
      if(src2){
        //显示后，去掉src2属性
        $(this).attr("src", src2).removeAttr("src2");
      }
    }
  });
 };
 imgLoad();
 $(window).bind("scroll", function() {
   imgLoad();
 });
}
lazyload({
  defObj:".w1"
});