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
caterien
caterien
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