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<iframe src="1.html" name="if1"></iframe>
<iframe src="2.html" name="if2"></iframe>
1.html<div id="a1">这里也可以点</div>
<script>
window.onload = function(){
document.body.onclick = function(){
parent.document.getElementById("if2").contentWindow.document.getElementById("a1").innerHTML = "1被点了";
}
}
</script>
2.html<div id="a1">你倒是点我试试</div>
<script>
window.onload = function(){
document.body.onclick = function(){
parent.document.getElementById("if1").contentWindow.document.getElementById("a1").innerHTML = "2被点了";
}
}
</script>