例如：点击后会把另一个iframe中的值得到弹出
Main：
<html lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8" /> <title></title> </head> <body> <iframe id="A" src="A.html" height="300"></iframe> <iframe id="B" src="B.html" height="300"></iframe> </body> </html>
页面A.html
<html lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8" /> <title></title> <script type="text/javascript"> function GetPhone () { var phone = "" var rdos = document.getElementsByName("rdo"); for (var i = 0; i < rdo.length; i++) { if (rdos[i].checked) { phone = document.getElementById(rdos[i].id + "_demo").value; return phone; } } } </script> </head> <body> 移动： <input type="radio" name="rdo" id="mobile" /> <input type="text" name="name" id="mobile_demo" /><br /> 固话： <input type="radio" name="rdo" id="tel" /> <input type="text" name="name" id="tel_demo" /> </body> </html>
页面B，调用页面A的js方法得到用户选择的电话
<html lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8" /> <title></title> <script type="text/javascript"> window.onload = function () { document.getElementById("btn").onclick = function () { var tel = parent.A.GetPhone();//调用页面A方法 alert(tel); } } </script> </head> <body> <input type="button" name="" value="点我！" id="btn" /> </body> </html>