Basic operation method:
document.frames("frame_id").document.action;
where, frame_id is the id of the iframe that needs to be operated on the parent page, and action is the relevant operation in the iframe.
From this method, it can be seen that document.frames("frame_id") is used to obtain the id of the iframe from the parent page, and the subsequent document.action is the same as the general script operation on page elements. The specific example is To illustrate, the parent page refers to the iframe part as follows:
testIframe.jsp is as follows:
<%@ page language= "java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
test_iframe</ title> <br></head> <br><body> <br><table class="data_form" align="center"> <br><tr> <br><th>testname< ;/th> <br><td><input name="testname" type="text" id="testname" value="testname" ></td> <br></tr> <br><tr> <br><th>description</th> <br><td><input name="decription" type="text" id="decription" value="testname" /> ;</td> <br></tr> <br></table> <br><br> <br><div > <br><input name="fs" type= "submit" id="fs" value="test" onClick="alert('test');" class="button"> <br></div> <br></body> <br> </html> <br>
</div> <br>The script for operating iframe elements in the parent page is as follows: <br><div class="codetitle">
<span><a style="CURSOR: pointer" data="4681" class="copybut" id="copybut4681" onclick="doCopy('code4681')"><u>Copy code</u></a></span> The code is as follows: </div>
<div class="codebody" id="code4681"> <br><script type="text/javascript"><!-- <BR>function iframe_test(){ <BR>if (document.frames("test_iframe ").document.getElementById("testname").value=="testname") <BR>{ <BR>alert("test successful!"); <BR>} <BR>if(document.frames("test_iframe ").document.getElementById("description").value=="") <BR>{ <BR>document.frames("test_iframe").document.getElementById("description").value="description" <BR>} <BR>} <BR>// --></script> <br>
</div>
<br>This example describes reading elements in an iframe in the parent page and modifying elements in the iframe in the parent page The element's properties. <br><br>Through this example, we can see that there is no essential difference between accessing each element in the iframe in the parent page and general access to page elements. It is nothing more than obtaining the iframe object that needs to be processed in the parent page in advance. After obtaining the iframe object, its operation is basically nothing special.
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<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/887/227/169329799838346.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How do I crop an IFrame in HTML?" />
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<a href="https://www.php.cn/faq/599599.html" title="How do I crop an IFrame in HTML?" class="phphistorical_Version2_mids_title">How do I crop an IFrame in HTML?</a>
<span class="Articlelist_txts_time">Aug 29, 2023 pm 04:33 PM</span>
<p class="Articlelist_txts_p">Inline frames are called iframes in HTML. A label specifies a rectangular area within the content where the browser can display different documents with scroll bars and borders. To embed another document within the current HTML document, use inline frames. A reference to an element can be specified using the HTMLiframe name attribute. In JavaScript, references to elements are also made using the name attribute. An iframe is essentially used to display a web page within the currently displayed web page. The URL of the document containing the iframe is specified using the "src" attribute. Syntax The following is the syntax of HTML <iframesrc="URL"title="d</p>
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<div class="phphistorical_Version2_mids">
<a href="https://www.php.cn/faq/596001.html" title="Why does iframe load slowly?" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202308/24/2023082417511432878.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Why does iframe load slowly?" />
</a>
<a href="https://www.php.cn/faq/596001.html" title="Why does iframe load slowly?" class="phphistorical_Version2_mids_title">Why does iframe load slowly?</a>
<span class="Articlelist_txts_time">Aug 24, 2023 pm 05:51 PM</span>
<p class="Articlelist_txts_p">The reasons for slow loading of iframes mainly include network delay, long resource loading time, loading order, caching mechanism and security policy. Detailed introduction: 1. Network delay. When the browser loads a web page containing an iframe, it needs to send a request to the server to obtain the content in the iframe. If the network delay is high, the time to obtain the content will increase, resulting in slow loading of the iframe. ; 2. When the resource loading time is long, the size of the resource is large or the server response time is long, the loading speed will be more obviously slower; 3. Loading sequence, etc.</p>
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<div class="phphistorical_Version2_mids">
<a href="https://www.php.cn/faq/599101.html" title="What does data-id in iframe mean?" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202308/28/2023082814252193959.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="What does data-id in iframe mean?" />
</a>
<a href="https://www.php.cn/faq/599101.html" title="What does data-id in iframe mean?" class="phphistorical_Version2_mids_title">What does data-id in iframe mean?</a>
<span class="Articlelist_txts_time">Aug 28, 2023 pm 02:25 PM</span>
<p class="Articlelist_txts_p">The data-id in an iframe refers to a custom attribute used in HTML tags to store the identifier of a specific element. By using the data-id attribute, you can add a unique identifier to the iframe element so that it can be manipulated and accessed in JavaScript. The naming of the data-id attribute can be customized according to specific needs, but some naming conventions are usually followed to ensure its uniqueness and readability. The data-id attribute can also be used to identify and manipulate a specific iframe.</p>
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<a href="https://www.php.cn/faq/520600.html" title="Microsoft: Outlook error downloads 'TokenFactoryIframe' file on every visit" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/000/164/168186390343243.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Microsoft: Outlook error downloads 'TokenFactoryIframe' file on every visit" />
</a>
<a href="https://www.php.cn/faq/520600.html" title="Microsoft: Outlook error downloads 'TokenFactoryIframe' file on every visit" class="phphistorical_Version2_mids_title">Microsoft: Outlook error downloads 'TokenFactoryIframe' file on every visit</a>
<span class="Articlelist_txts_time">Apr 19, 2023 am 08:25 AM</span>
<p class="Articlelist_txts_p">Microsoft Outlook is downloading a mysterious file called "TokenFactoryIframe" on macOS when users access the email service through the Safari browser. This issue has now been widely reported by users who have discovered "TokenFactoryIframe" files that Outlook downloads on every visit. Outlook downloads this mysterious file every few seconds or at least every time you access Outlook on Apple platforms. Based on our findings, this appears to be an issue caused by an incorrect server-side update posted to Outlook and has nothing to do with Safari or macOS. Microsoft in a copy</p>
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<a href="https://www.php.cn/faq/595827.html" title="What technology can replace iframe" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202308/24/2023082413541968774.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="What technology can replace iframe" />
</a>
<a href="https://www.php.cn/faq/595827.html" title="What technology can replace iframe" class="phphistorical_Version2_mids_title">What technology can replace iframe</a>
<span class="Articlelist_txts_time">Aug 24, 2023 pm 01:53 PM</span>
<p class="Articlelist_txts_p">Technologies that can replace iframes include Ajax, JavaScript libraries or frameworks, Web component technologies, front-end routing, and server-side rendering. Detailed introduction: 1. Ajax is a technology used to create dynamic web pages. It can realize asynchronous update of the page by exchanging data with the server in the background without refreshing the entire page. Using Ajax can load and display content more flexibly, and there is no need to use iframe to embed other pages; 2. JavaScript library or framework , such as React and so on.</p>
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<div class="phphistorical_Version2_mids">
<a href="https://www.php.cn/faq/599086.html" title="What are the loading events of iframe?" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202308/28/2023082813514630803.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="What are the loading events of iframe?" />
</a>
<a href="https://www.php.cn/faq/599086.html" title="What are the loading events of iframe?" class="phphistorical_Version2_mids_title">What are the loading events of iframe?</a>
<span class="Articlelist_txts_time">Aug 28, 2023 pm 01:55 PM</span>
<p class="Articlelist_txts_p">The loading events of iframe include onload event, onreadystatechange event, onbeforeunload event, onerror event, onabort event, etc. Detailed description: 1. onload event, specifying the JavaScript code to be executed after loading the iframe; 2. onreadystatechange event, specifying the JavaScript code to be executed when the iframe state changes, etc.</p>
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<div class="phphistorical_Version2_mids">
<a href="https://www.php.cn/faq/604434.html" title="What's the danger in iframes" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202309/08/2023090815142962875.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="What's the danger in iframes" />
</a>
<a href="https://www.php.cn/faq/604434.html" title="What's the danger in iframes" class="phphistorical_Version2_mids_title">What's the danger in iframes</a>
<span class="Articlelist_txts_time">Sep 08, 2023 pm 03:14 PM</span>
<p class="Articlelist_txts_p">The dangers in iframes mainly include: 1. Security vulnerabilities. Malicious web pages can load other web pages through iframes and carry out some attacks; 2. Same-origin policy breakthrough. By loading web pages under other domain names in iframes, the same-origin policy can be breached. strategy to achieve cross-domain communication, which may be maliciously attacked; 3. Code execution issues, web pages loaded in iframes can execute JS code, which may cause some security issues; 4. SEO issues, search engines may not be able to correctly parse and Index content loaded via iframe and more.</p>
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<div class="phphistorical_Version2_mids">
<a href="https://www.php.cn/faq/596547.html" title="What does iframe mean in Python?" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202308/25/2023082515190938735.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="What does iframe mean in Python?" />
</a>
<a href="https://www.php.cn/faq/596547.html" title="What does iframe mean in Python?" class="phphistorical_Version2_mids_title">What does iframe mean in Python?</a>
<span class="Articlelist_txts_time">Aug 25, 2023 pm 03:24 PM</span>
<p class="Articlelist_txts_p">iframe in Python is an HTML tag used to embed another web page or document in a web page. In Python, you can use various libraries and frameworks to process and manipulate iframes, the most commonly used of which is the BeautifulSoup library, which can easily extract the content of an iframe from a web page and manipulate and process it. Knowing how to handle and manipulate iframes is extremely useful for both web development and data scraping.</p>
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