跨域Iframe脚本调用

        js跨域调用许多种解决方案，有document.domain+iframe、动态创建script和HTML5 postMessage等等。最近遇到了一些案例，需要调用iframe的脚本，而又不能使用document.domain来解决，这有一个比较有趣的解决跨域，原理是利用location.hash来进行传值.

a.com下的1.html文件

<script type="text/javascript">
var url = "http://b.com/2.html";
var iframe = null;

window.onload = function(){
	iframe = document.createElement("iframe");

	iframe.src = url;
	iframe.style.width = "100%";
	iframe.style.height = "1px";
	iframe.style.border = "none";
	
	document.body.appendChild(iframe);
}

function sendData(data){
        try {
        if (console.log) {
            console.log('Send data '+data);
            
            iframe.src = url + "#" + data;
        }
    } catch(e) {};
}
</script>

b.com下的2.html文件

<script type="text/javascript">
var url = "http://b.com/2.html";
var iframe = null;

window.onload = function(){
	setInterval(receiveData, 2000);
}

function receiveData(){
        try {
        var data = location.hash ? location.hash.substring(1) : '';
        if (console.log) {
            console.log('Receive the data is '+data);
        }
    } catch(e) {};
}
</script>