<html >
<head>
<title>无标题文档</title>
</head>
<body>
<div class="aaa">你好</div>
<div class="bbb" style="display:none;">更改我的属性</div>
<div class="aaa"></div>
<div class="bbb" style="display:none;">更改我的属性</div>
<div class="aaa">你好</div>
<div class="bbb" style="display:none;">更改我的属性</div>
</body>
</html>
<script>
var arr = document.getElementsByClassName('aaa'),temp = [];
var brr=document.getElementsByClassName('bbb');
for(var i = 0;i<arr.length;i++){
temp.push(arr[i].innerHTML)
}
for(var i = 0;i<arr.length;i++)
{
if(temp[i]=='你好')
{
brr[i].style.display="block";
}
}
</script>
