window.onload=function(){

    waterfall('main','pin');

    var dataInt={'data':[{'src':'1.jpg'},{'src':'2.jpg'},{'src':'3.jpg'},{'src':'4.jpg'}]};
    
    window.onscroll=function(){
        if(checkscrollside()){
            var oParent = document.getElementById('main');// 父级对象
            for(var i=0;i<dataInt.data.length;i++){
                var oPin=document.createElement('div'); //添加 元素节点
                oPin.className='pin';                   //添加 类名 name属性
                oParent.appendChild(oPin);              //添加 子节点
                var oBox=document.createElement('div');
                oBox.className='box';
                oPin.appendChild(oBox);
                var oImg=document.createElement('img');
                oImg.src='./images/'+dataInt.data[i].src;
                oBox.appendChild(oImg);
            }
            waterfall('main','pin');
        };
    }
 }