按理说显示出来的长度应该是16吧，为什么结果却是1呢

Question

 这是html的代码<div id="container">     <div class="box">         <div class="img_box"><img src="img/meinv5.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv2.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv3.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv7.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv3.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv6.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv2.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv7.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv2.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv5.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv2.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv3.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv7.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv5.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv6.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv2.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv7.jpg" /></div>         </div>         <div class="box">         <div class="img_box"><img src="img/meinv2.jpg" /></div>         </div>    </div>这是js的代码window.onload=function(){ imgNum("container","box");  }function imgNum(a,b){ var anum=document.getElementById(a) var content=getbc(anum,b); console.log(content.length);  }function getbc(a,b){ var barr=[]; var allcontent=a.getElementsByTagName("*"); for(var i=0;i<allcontent.length;i++){  if(allcontent[i].className==b){   barr.push(allcontent[i]);  }  return barr; }}实际结果

Answer 1

哈哈哈，终于发现问题在哪了，return应该放在大括号外面

Answer 2

请无视前面那么多div吧