HTML連載79-背景圖片定位區域屬性、背景顏色

padding-left（預設）；content-box；border-box    <style>
        *{
            margin:0;
            padding;0;        }
        ul li{
            list-style: none;
            float:left;
            width: 200px;
            height: 200px;
            text-align:center;
            line-height:100px;
            border:10px dashed black;
            margin-left: 20px;
            background:url("image/mountain.jpg") no-repeat;
        }
        ul li:nth-child(2){
            background-origin: padding-box;/*背景圖片預設從什麼區域開始顯示,預設就是從padding區域開始顯示*/
        }
        ul li:nth-child(3){
            background-origin: border-box;
        }
        ul li:nth-child(4){
            background-origin: content-box;
        }...............省略程式碼............
<ul>
    <li>預設</li>
    <li>padding</li>
    <li>border</li>
    <li>content</li>