已在IE測試，希望采納！如有問題歡迎繼續交流！
//1.html
<html>
<head>
<script type="text/javascript">
function sendkey(){
var key = String.fromCharCode(event.keyCode);//IE
var frm = document.getElementById("frm1");
frm.src = new Date().getTime();//保證刷新
frm.src = "frm1.html#" + key;
}
</script>
</head>
<body onkeyup="sendkey()">
1.html<br/>
<iframe src="frm1.html" id="frm1"></iframe>
</body>
</html>
//frm1.html
<html>
<head>
<script type="text/javascript">
var key=location.hash.split('#')[1];
if(typeof key!='undefined')
alert(key);
</script>
</head>
<body>
frm1.html
</body>
</html>