html js 跨域 p3p

• <iframe id="tst" src="javascript:false"></iframe>
• <script>
• var cw = window.frames['tst'];
• cw.document.open();
• cw.document.write('<script>alert("test")<' + '/script>');
• cw.document.write('<div>test</div>');
• cw.document.close();
• </script>

这段代码可以实现 js动态的创建iframe，然后向里面append DOM元素、JS函数

js动态的创建iframe：

var f=document.createElement("IFRAME");
f.id = "iframe01";
f.name= "iframe01";
f.height=1000;
f.width=1000;
f.src='https://system.netsuite.com/app/accounting/transactions/inventory/inventorynumbereditor.nl?l=T&tranid=745&lineid=1'; //"about:blank"
document.body.appendChild(f);

var header= new Array();
header['P3P: CP']= 'CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR';
header['Set-Cookie']= 'test=axis; expires=Sun, 23-Dec-2018 08:13:02 GMT; domain=.google.com; path=/';
var url ='https://mail.google.com/mail/#inbox';
nlapiRequestURL(url, null, header);

如上代码失败可知：ajax不支持跨域， 这样跨域必须要用到php,jsp或者c++等动态语言服务端的代理。

详细见：

http://blog.csdn.net/lanmao100/archive/2008/04/25/2328491.aspx 用P3P header解决iframe跨域访问cookie/session

http://viralpatel.net/blogs/2008/12/how-to-set-third-party-cookies-with-iframe.html How to set third-party cookies with iframe

http://hi.baidu.com/aullik5/blog/item/cde7f31efc3953f2e0fe0b46.html P3P Header Tips