// 打開瀏覽器輸入URL:www.dbjr.com.cn
//F12打開控制臺
//在控制臺中依次輸入下面內(nèi)容

//輸入
window.name;
//返回
''

//輸入
window.name='test';
//返回
'test'

//輸入
location.;
//返回
http://www.baidu.com

//輸入
window.name;
//返回
'test'

//控制臺輸入
Object.keys($('iframe').contentWindow);

//返回
["postMessage", "blur", "focus", "close", "parent", "opener", "top", "length", "frames", "closed", "location", "self", "window"]

Uncaught DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.

<script type="text/javascript">
    window.name = 'I was there!';    // 這里是要傳輸?shù)臄?shù)據(jù)，大小一般為2M，IE和firefox下可以大至32M左右
                                     // 數(shù)據(jù)格式可以自定義，如json、字符串
</script>

<script type="text/javascript">
    var state = 0, 
    iframe = document.createElement('iframe'),
    loadfn = function() {
        if (state === 1) {
            var data = iframe.contentWindow.name;    // 讀取數(shù)據(jù)
            alert(data);    //彈出'I was there!'
        } else if (state === 0) {
            state = 1;
            iframe.contentWindow.location = "http://a.com/proxy.html";    // 設(shè)置的代理文件
        }  
    };
    iframe.src = 'http://b.com/data.html';
    if (iframe.attachEvent) {
        iframe.attachEvent('onload', loadfn);
    } else {
        iframe.onload  = loadfn;
    }
    document.body.appendChild(iframe);
</script>

<script type="text/javascript">
    iframe.contentWindow.document.write('');
    iframe.contentWindow.close();
    document.body.removeChild(iframe);
</script>