父页面：index.html(使用iframe包含子页面child.html)
<html><head><script type="text/javascript"><!--function toshow(msg){alert("这里是父页面:"+msg);}// --></script></head><body><iframe background="blue" src="child.html" mce_src="child.html"></iframe></body></html>
子页面child.html(调用父页面toshow方法)
<html><head><script type="text/javascript"><!--function doparent(){window.parent.toshow('ccccchild');}// --></script></head><body>This is child frame!!<input type="button" value="请点击" οnclick='doparent()'></input></body></html>
