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Resolve cross-domain IFRAME adaptive height (from: http://www.lzlu.com/blog? P = 692)

Source: Internet
Author: User
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About the IFRAME adaptive height of the discussion can first look at the reputation of UED blog http://ued.koubei.com /? P = 1217

For general principles, see:

Can look at the example directly: http://lzlu.com/lab/loader/

The code below is displayed directly.
The following is the core code loader. js.

?
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677 /** * Cross-origin IFRAME adaptive Height Solution * Author: changyin@taobao.com  * Copyright (c) 2011, Taobao Inc. All rights reserved. */ var Loader = new function(){    var doc = document,body = doc.body,        self = this,         // Obtain parameters in the URL        getRequest = function(name) {            var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)","i"),                r = window.location.search.substr(1).match(reg);            return (r!=null)?  unescape(r[2]) : null;        },         // Get the configuration. The script priority is higher than the URL parameter.        getConfig = function(){            var scripts = doc.getElementsByTagName('script'),                script = scripts[scripts.length - 1];            return function(param){                var p = script.getAttribute(param);                return p? p : getRequest(param);            };        }(),         // Proxy height        proxyheight = 0,         // The ID of the frame on the top page        frameid = getConfig("data-frameid"),         // Listener real-time update height Interval        timer = getConfig("data-timer"),         // Obtain the proxy URL        getProxyuUrl = getConfig("data-proxy"),         // Create the IFRAME of the proxy        proxyframe = function(){            var el = doc.createElement("iframe");            el.style.display = "none";            el.name="proxy";            return el;        }();     // Reset the height    this.resize = function(){        proxyheight = body.offsetHeight;        proxyframe.src =  getProxyuUrl + "?data-frameid=" + frameid+ "&data-frameheight=" + (proxyheight+40);    }     this.init = function(){        var init = function(){            body.appendChild(proxyframe);            self.resize();            // Whether to update            if(!isNaN(timer)){                timer = timer<500?500:timer;                window.setInterval(function(){                    if(body.offsetHeight != proxyheight){                        self.resize();                    }                },timer);            };        };        if(doc.addEventListener){            window.addEventListener("load",init,false);        }else{            window.attachEvent("onload",init);        }        // If the JS framework is introduced, we recommend that you change the above sentence, for example, kissy. Ready (function () {Init ();});    }}; Loader.init();

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Proxy file proxy.html

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1234567891011121314151617181920212223242526 <!DOCTYPE html><html><head><title>proxy</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body><script>(function() {    var getRequest = function(name) {            var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)","i"),                r = window.location.search.substr(1).match(reg);            return (r!=null)?  unescape(r[2]) : null;        },        height = getRequest("data-frameheight");    try {        var el = window.top.document.getElementById(getRequest("data-frameid"));        if (!el) return;        el.style.height = height + 'px';    }    catch (e) {        //console.log(e);    }})();</script></body></html>

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Usage:
1. Introduce loader. js to the IFRAME to be included on the home page

2. input parameters. There are two methods for passing parameters:

1. When the IFRAME is referenced on the home page, the parameter is passed after the URL of the IFRAME to be referenced.
For example, <IFRAME id = "testframe" src1_a.html? Data-frameid=testframe&data-auto=200&data-proxy?proxy.html "> </iframe>

2. input when the IFRAME page contains loader. js
Example: <SCRIPT src = "loader. js" data-frameid = "testframe" data-timer = "2000" data-proxy = “proxy.html "> </SCRIPT>

If you are not busy, follow the example http://lzlu.com/lab/loader/to write it. Then proxy.htmlmust be in the same domain as the most specific page.

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