用瀑布流的方式在網頁上插入圖片

當我們的網頁需要插入很多圖片的時候，為了美觀，我們可以選擇用瀑布流的方法插入圖片

首先我們在body裡面放入我們需要展示的圖片

<div id="box">
    <div class="dinwei">
        <div class="pic">
            <img src="image/1.jpg">
        </div>
    </div>
    <div class="dinwei">
        <div class="pic">
            <img src="image/2.jpg">
        </div>
    </div>
    <div class="dinwei">
        <div class="pic">
            <img src="image/3.jpg">
        </div>
    </div>
    <div class="dinwei">
        <div class="pic">
            <img src="image/4.jpg">
        </div>
    </div>
    <div class="dinwei">
        <div class="pic">
            <img src="image/5.jpg">
        </div>
    </div>
    <div class="dinwei">
        <div class="pic">
            <img src="image/6.jpg">
        </div>
    </div>
    <div class="dinwei">
        <div class="pic">
            <img src="image/7.jpg">
        </div>
    </div>
    <div class="dinwei">
        <div class="pic">
            <img src="image/8.jpg">
        </div>
    </div>
    <div class="dinwei">
        <div class="pic">
            <img src="image/9.jpg">
        </div>
    </div>
</div>

然後設定樣式

<style type="text/css">
        *{
            margin: 0;
            padding: 0;
        }
        .dinwei{
            float: left;
        }
        .pic{
            padding: 5px;
            border: 1px solid #000000;
        }
        img{
            margin: 0;
            padding: 10px;
            width: 220px;
            height: auto;
        }
    </style>

接下來就是把圖片用瀑布流的方式展現的JS

<script type="text/javascript">
    window.onload=function(){
    var dinwei=document.getElementsByClassName("dinwei");
    var windwidth=document.documentElement.clientWidth||document.body.clientWidth;
    var dinwidth=getStyle(dinwei[0],"width");
    var num=Math.floor(windwidth/dinwidth);
    //計算一行幾張圖片
    //取出高度最小的列
    var heightList=[];
    for(var i=0;i<dinwei.length;i++){
        if(i<num){
            heightList[heightList.length]=getStyle(dinwei[i],"height");
        }else{
            var minHeight=getmin(heightList);
            var amin=minHeight.value;
            var index=minHeight.index;

            var temp=dinwei[i];
            temp.style.position="absolute";
            temp.style.top=amin+"px";
            temp.style.left=index*dinwidth+"px";
            heightList[index]=amin+getStyle(temp,"height");
        }
    }
    }
    function getmin(arr){
        var min=arr[0];[3,3,2,1,5,2]
        for(var i=1;i<arr.length;i++){
            if(arr[i]<min){
                min=arr[i];
            }
        }
        var index=0;
        for(var j=0;j<arr.length;j++){
            if(arr[j]==min){
                index=j;
                break;
            }
        }
        return {value:min,index:index}
    }
    function getStyle(obj, attr) {
        if (obj.currentStyle) {
            return parseFloat(obj.currentStyle[attr]);
        } else {
            return parseFloat(window.getComputedStyle(obj)[attr]);

        }
    }
</script>