唉呀妈呀，头一次写这么多前端代码==就是实现一个图片密铺，滚动条下拉且一直加载（类似于百度图片搜索界面的效果）

图片都是存储在img文件夹下的 js存在js文件夹下 css存在css文件夹下

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>瀑布流</title>
    <script src="js/app.js"></script>
    <link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<body>
    <div id="container">
        <div class="box">
            <div class="box_img">
                <img src="img/0.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/1.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/2.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/3.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/4.jpg">
            </div>
        </div>
        <div class="box">
            <div box_img>
                <img src="img/5.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/0.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/6.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/7.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/8.jpg">
            </div>
        </div>

        <div class="box">
            <div class="box_img">
                <img src="img/9.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/10.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/11.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/9.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/12.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/13.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/14.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/15.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/16.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/17.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/18.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/19.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/20.jpg">
            </div>
        </div>
        <div class="box">
            <div class="box_img">
                <img src="img/21.jpg">
            </div>
        </div>
    </div>
</body>
</html>

window.οnlοad=function(){
    imgLocation("container","box");
    var imgData={"data":[{"src":"2.jpg"},{"src":"3.jpg"},{"src":"4.jpg"},{"src":"7.jpg"},{"src":"8.jpg"}]}
    window.οnscrοll= function () {
        if(checkFlag())
        {
            var cparent=document.getElementById("container");
            for(var i=0;i<imgData.data.length;i++)
            {
                var ccontent=document.createElement("div");
                ccontent.className="box";
                cparent.appendChild(ccontent);
                var boximg=document.createElement("div");
                boximg.className="box_img";
                ccontent.appendChild(boximg);
                var img=document.createElement("img");
                img.src="img/"+imgData.data[i].src;
                boximg.appendChild(img);
            }
            imgLocation("container","box");
        }
    }
}
function checkFlag(){
    var cparent=document.getElementById("container");
    var ccontent=getChildElement(cparent,"box");
    var lastContentHeight=ccontent[ccontent.length-1].offsetTop;
    //console.log(lastContentHeight);
    var scrollTop=document.documentElement.scrollTop||document.body.scrollTop;
   // console.log(scrollTop);
    var pageHeight=document.documentElement.clientHeight||document.body.clientHeight;
    //console.log(lastContentHeight+":"+scrollTop+":"+pageHeight);
    if(lastContentHeight<scrollTop+pageHeight){
        return true;
    }
    else return false;
}
function imgLocation(parent,content){
    var cparent=document.getElementById(parent);
    var ccontent=getChildElement(cparent,content);
    //console.log(ccontent);
    var imgWidth=ccontent[0].offsetWidth;
    var num=Math.floor(document.documentElement.clientWidth/imgWidth);
    cparent.style.cssText="width:"+imgWidth*num+"px;margin:0 auto";
    var BoxHeightArr=[];
    for(var i=0;i<ccontent.length;i++)
    {
        if(i<num)
        {
            BoxHeightArr[i]=ccontent[i].offsetHeight;
        }
        else
        {
            var minHeight=Math.min.apply(null,BoxHeightArr);
            //console.log(minHeight);
            var minIndex=getminheightLocation(BoxHeightArr,minHeight);
            ccontent[i].style.position="absolute";
            ccontent[i].style.top=minHeight+"px";
            ccontent[i].style.left=ccontent[minIndex].offsetLeft+"px";
            BoxHeightArr[minIndex]=BoxHeightArr[minIndex]+ccontent[i].offsetHeight;
        }
       // console.log(BoxHeightArr[i]);
    }
}
function getminheightLocation(BoxHeightArr,minHeight)
{
    for(var i in BoxHeightArr)
    {
        if(BoxHeightArr[i]==minHeight)
            return i;
    }
}
function getChildElement(parent,content){
    var contentArr=[];
    var allcontent=parent.getElementsByTagName("*");
    for(var i=0;i<allcontent.length;i++)
    {
        if(allcontent[i].className==content)
        {
            contentArr.push(allcontent[i]);
        }
    }
    return contentArr;
}

*{//class
    margin:0px;
    padding:0px;
}
#container{//id
    position: relative;
}
.box{
    padding :5px;
    float:left;
}
.box_img{
    padding: 5px;
    border:1px solid #cccccc;
    box_shadow:0 0 5px #cccccc;
    border_radius:5px;
}
.box_img img{
    weight:150px;
    height:auto;
}