background： url(**);
background-size: cover;
background-position: center center;
v+="<div class='jdal-img' onmouseover='aaa(this)' onmouseout='bbb(this)' style=' width: 100%; height: 200px; background-image: url("+data.content[i].pictureUrl+"); background-size: cover;background-position: center center;z-index: 10;'>";
v+="<div style=' width:90%; height:150px; padding-left:15px; padding-right:10px; opacity:0.85; z-index:11; color:#fff; font-size:15px; background-color:#03a9f4; display: none; padding-top:50px; '><img style='width:70px;height:70px;margin-left:73px;margin-top:-30px; margin-bottom:20px;' src='images/xjdal-tb.png'><br>"+data.content[i].content+"</div>";
