json封装数据，然后通过创造的标签调用

<ul class="list">
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>

 var jp = {
              "height":"354px",
              "image":"http://www.wookmark.com/images/thumbs/629761_wookmark.jpg",
              "title":"Pinterest • The world",
              "width":"236px"
             };
     var UL = document.getElementsByClassName('list')[0];
     var LI = UL.getElementsByTagName('li');

     for(var i=0;i<LI.length;i++){
         var img = document.createElement("img");
             function atrbute(a,b){  //会用到两次所以就封装一个函数传入参数进行调用即可
                 img.setAttribute(a,b);
                 }
             atrbute("src",jp.image);//传参调用
             atrbute('title',jp.title);//传参调用
             img.style.width=jp.width;
             img.style.height=jp.height;
             LI[i].appendChild(img);
     }