这是HTML<div class="content_box" id="content_box"> <div class="content_intro" id="content_intro"> <h3>所向披靡的响应式开发</h3> <p>忘记设备尺寸,一套代码适应多终端,响应式开发让用户体验和开发效率完美结合</p> </div> <div class="content_bottom"> <span class="1 color-red">¥128.00</span> <span class="r">1560人在学</span> </div> </div> css.content_box{ width: 200px; height: 148px; overflow: hidden; position: relative; background-image: url(../image/list1.jpg);}.content_intro{ box-sizing: border-box; padding: 0 20px; top: 74px; height: 129px; width: 100%; background-image: url(../image/bd.png); position: absolute;}.content_bottom{ padding: 0 20px; bottom: 0; box-sizing: border-box; width: 100%; height: 37px; background-color: #fff; color: #93999f; font-size: 12px; position: absolute;}.color-red{ color: #EF1300 !important; float: left; } .r{ float: right;}.content_intro h3{ height: 38px; color: #14191e; font: 14px "微软雅黑"; line-height: 38px;}.content_intro p{ color: #93999f; font-size: 12px; height: 35px; overflow: hidden;}这是jswindow.onload = function(){ var content_box=document.getElementsByName("content_box"); content_box.onmouseover=function(){ move(); } content_box.onmouseout=function(){ move1(); } } var timer=null; function move(){ clearInterval(timer); var hidden = document.getElementsByName("content_intro"); timer=setInterval(function(){ if(hidden.offsetTop==19 ){ clearInterval(timer); }else{ hidden.style.top=hidden.offsetTop-1+"px"; } },10) } function move1(){ clearInterval(timer); var hidden = document.getElementsByName("content_intro"); timer=setInterval(function(){ if(hidden.offsetTop>=74 ){ clearInterval(timer); }else{ hidden.style.top=hidden.offsetTop+1+"px"; } },10) } </script>我是要用到多个,所以获取ID的方法不适用 怎么可以获取ClassName来实现获取ID的效果?
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