# 1.html
```
<html>
<head>
<title>111</title>
</head>
<body>
<script>
function fun(){
let data = document.getElementById("text").value;
parent.window.fun(data);
}
</script>
<input id="text" placeholder="请输入内容"/>
<button onclick="fun()">submit</button>
</body>
</html>
```
# 2.html
```
<html>
<head>
<title>222</title>
</head>
<body>
<script>
function fun(data){
document.getElementById("text").value = data;
}
</script>
<input id="text" placeholder="接收的内容"/>
</body>
</html>
```
# index.html
```
<html>
<head>
<title>首页</title>
<meta charset="utf-8"/>
</head>
<body>
<script>
function fun(data){
window.frames[1].fun(data);
}
</script>
<iframe id="c1" src="./1.html"></iframe>
<iframe id="c2" src="./2.html"></iframe>
</body>
</html>
```
