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js operation sample code for frameset, frame, iframe_javascript skills

js operation sample code for frameset, frame, iframe_javascript skills

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May 16, 2016 pm 05:25 PM

frame iframe

Overview of Frame Programming
An HTML page can have one or more sub-frames, which are marked with and are used to display an independent HTML page. The framework programming discussed here includes self-control of frameworks and mutual access between frameworks, such as referencing JavaScript variables in another framework from one framework, calling functions in other frameworks, controlling the behavior of forms in another framework, etc. <br><br><strong>Mutual references between frames</strong> <br>All frames in a page are provided as attributes of the window object in the form of a collection. For example: window.frames represents the attributes of all frames in the page. Collections are similar to form objects, link objects, picture objects, etc. The difference is that these collections are attributes of the document. Therefore, to reference a subframe, you can use the following syntax: <br>window.frames["frameName"]; <br>window.frames.frameName <br>window.frames[index] <br>where the word window is also You can use self instead or omit it. Assuming that frameName is the first frame in the page, the following writing methods are equivalent: <br>self.frames["frameName"] <br>self.frames[0] <br>frames [0] <br>frameName <br>Each frame corresponds to an HTML page, so this frame is also an independent browser window. It has all the properties of a window. The so-called reference to the frame is also a reference to the window object. With this window object, you can easily operate the pages in it, such as using the window.document object to write data to the page, using the window.location property to change the page in the frame, etc. <br><br><strong>The following introduces the mutual references between different levels of frameworks: </strong> <br><br>1. Reference from parent frame to child frame <br> Knowing the above principles, it is very easy to reference the child frame from the parent frame, that is: <br>window.frames["frameName"]; <br>In this way, the name within the page is referenced is the subframe of frameName. If you want to reference a subframe within a subframe, according to the nature of the window object, the referenced frame can be implemented like this: <br>window.frames["frameName"].frames["frameName2"]; <br>This is how to reference When it comes to the second-level sub-framework, and so on, the reference of multi-layer frameworks can be achieved. <br><br>2． Reference from child frame to parent frame <br>Each window object has a parent attribute that represents its parent frame. If the frame is already a top-level frame, window.parent also represents the frame itself. <br><br>3． References between sibling frames <br> If two frames are sub-frames of the same frame, they are called sibling frames. They can reference each other through the parent frame. For example, a page includes 2 sub-frames: <br></p> <div class="codetitle"> <span><a style="CURSOR: pointer" data="81594" class="copybut" id="copybut81594" onclick="doCopy('code81594')"><u>Copy code</u></a></span> The code is as follows:</div> <div class="codebody" id="code81594"> <br><frameset rows="50%,50%"> <br>< frame src="1.html"name="frame1" /> <br><frame src="2.html"name="frame2" /> <br></frameset> <br> </div> <br>You can use the following statement in frame1 to reference frame2: <br>self.parent.frames["frame2"]; <br><br>4. Mutual references between different levels of frameworks <br>The level of the framework is for the top-level framework. When the levels are different, as long as you know the level where you are and the level and name of the other frame, you can easily access each other by using the properties of the window object referenced by the frame, for example: <br>self.parent.frames["childName "].frames["targetFrameName"]; <br><br>5． The reference to the top-level frame <br> is similar to the parent attribute. The window object also has a top attribute. It represents a reference to the top-level frame, which can be used to determine whether a frame itself is a top-level frame, for example: <br><div class="codetitle"> <span><a style="CURSOR: pointer" data="73308" class="copybut" id="copybut73308" onclick="doCopy('code73308')"><u>Copy code</u></a></span> Code As follows: </div> <div class="codebody" id="code73308"> <br>//Determine whether this frame is a top-level frame<br>if(self==top){ <br>//dosomething <br>} <br> </div> <br> <strong>Change the loading page of the frame</strong> <br>The reference to the frame is the reference to the window object. Using the location attribute of the window object, you can change the navigation of the frame, for example: <br>window.frames[0] .location="1.html"; <br>This will redirect the page of the first frame in the page to 1.html. Using this property, you can even use one link to update multiple frames. <br><div class="codetitle"> <span><a style="CURSOR: pointer" data="51282" class="copybut" id="copybut51282" onclick="doCopy('code51282')"><u>Copy code</u></a></span> The code is as follows:</div> <div class="codebody" id="code51282"> <br><frameset rows="50%,50%" > <br><frame src="1.html"name="frame1" /> <br><frame src="2.html"name="frame2" /> <br></ frameset> <br> <br><a href="frame1.location='3.html;frame2.location='4.html'"onclick="">link&lt ;/a> <br> <br> </div> <br>Referencing JavaScript variables and functions in other frameworks<br>Before introducing the techniques of referencing JavaScript variables and functions in other frameworks, let’s take a look at the following code: <br><div class="codetitle"> <span><a style="CURSOR: pointer" data="90803" class="copybut" id="copybut90803" onclick="doCopy('code90803')"><u> Copy the code </u></a></span> The code is as follows: </div> <div class="codebody" id="code90803"> <br><script language="JavaScript" type="text/javascript"> <br> <br></script> <br> </div> <br>If you run this code, a "hello, ajax!" window will pop up, which is the result of executing the hello() function. So why did hello() become a method of the window object? Because all global variables and global functions defined within a page are members of the window object. For example: <br>var a=1; <br>alert(window.a); <br> will pop up a dialog box showing 1. The same principle applies to sharing variables and functions between different frameworks by calling them through the window object. <br>For example: a product browsing page consists of two sub-frames. The left side represents the link of the product category; when the user clicks the category link, the corresponding product list is displayed on the right side; the user can click the [Purchase] link next to the product Add items to cart. <br>In this example, you can use the left navigation page to store the products that the user wants to buy, because when the user clicks the navigation link, what changes is another page, the product display page, while the navigation page itself remains unchanged. , so the JavaScript variables in it will not be lost and can be used to store global data. The implementation principle is as follows: <br><br>Assume that the left page is link.html and the right page is show.html. The page structure is as follows: <br><div class="codetitle"> <span><a style="CURSOR: pointer" data="72240" class="copybut" id="copybut72240" onclick="doCopy('code72240')"><u>Copy code</u></a></span> The code is as follows: </div> <div class="codebody" id="code72240"> <br><!DOCTYPE HTML PUBLIC "-//W3C//DTDHTML 4.0 Transitional//EN"> <br><html> <br><head> <br><title> New Document </title> <br></head> <br><frameset cols="20%,80%"> <br>< frame src="link.html"name="link" /> <br><frame src="show.html"name="show" /> <br></frameset> <br>< /html> <br> </div> <br>You can add a statement like this next to the products displayed in show.html: <br><a href="void(0)"onclick="self.parent.link. addToOrders(32068)">Add to shopping cart</a> <br>where link represents the navigation frame, the arrOrders array is defined in the link.html page to store the id of the product, and the function addToOrders() is used to respond to the product next to it [ For the click event of the purchase] link, the parameter id it receives represents the id of the product. In the example, it is a product with an id of 32068: <br><div class="codetitle"> <span><a style="CURSOR: pointer" data="54486" class="copybut" id="copybut54486" onclick="doCopy('code54486')"><u>Copy code </u></a></span> The code is as follows:</div> <div class="codebody" id="code54486"> <br><script language="JavaScript" type="text/javascript"> <br> <br></script> <br> </div> <br>In this way, you can use arrOrders on the checkout page or shopping cart browsing page to get all the products ready to be purchased. <br>The framework can divide a page into multiple modules with independent functions. Each module is independent of each other, but can be connected through the reference of the window object. It is an important mechanism in Web development. <br><br>The value of the control in the Iframe page that is referenced in this page can be written directly: <br><div class="codetitle"> <span><a style="CURSOR: pointer" data="81189" class="copybut" id="copybut81189" onclick="doCopy('code81189')"><u>Copy code</u></a></span> Code As follows: </div> <div class="codebody" id="code81189"> <br>function test() { <br>var num = window.iframename.inputtextname.value; <br>alert( num ); <br>} <br> </div> <br>When the Iframe in this page wants to call the js code in the page, you can directly write: <br><input value="click" type="button"onclick="window.parent.test()" /> </div> </div> <div class="wzconShengming_sp"> <div class="bzsmdiv_sp">Statement of this Website</div> <div>The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. 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Microsoft in a copy</p> </div> <div class="phphistorical_Version2_mids"> <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. 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JavaScript library or framework , such as React and so on.</p> </div> <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> </div> <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> </div> <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> </div> </div> <a href="https://www.php.cn/web-designer.html" class="phpgenera_Details_mainL4_botton"> <span>See all articles</span> <img src="/static/imghw/down_right.png" alt="" /> </a> </div> </div> </div> </main> <footer> <div class="footer"> <div class="footertop"> <img src="/static/imghw/logo.png" alt=""> <p>Public welfare online PHP training，Help PHP learners grow quickly！</p> </div> <div class="footermid"> <a href="https://www.php.cn/about/us.html">About us</a> <a href="https://www.php.cn/about/disclaimer.html">Disclaimer</a> <a href="https://www.php.cn/update/article_0_1.html">Sitemap</a> </div> <div class="footerbottom"> <p> © php.cn All rights reserved </p> </div> </div> </footer> <input type="hidden" id="verifycode" value="/captcha.html"> <script>layui.use(['element', 'carousel'], function () {var element = layui.element;$ = layui.jquery;var carousel = layui.carousel;carousel.render({elem: '#test1', width: '100%', height: '330px', arrow: 'always'});$.getScript('/static/js/jquery.lazyload.min.js', function () {$("img").lazyload({placeholder: "/static/images/load.jpg", effect: "fadeIn", threshold: 200, skip_invisible: false});});});</script> <script src="/static/js/common_new.js"></script> <script type="text/javascript" src="/static/js/jquery.cookie.js?1744082628"></script> <script src="https://vdse.bdstatic.com//search-video.v1.min.js"></script> <link rel='stylesheet' id='_main-css' href='/static/css/viewer.min.css?2' type='text/css' media='all' /> <script type='text/javascript' src='/static/js/viewer.min.js?1'></script> <script type='text/javascript' src='/static/js/jquery-viewer.min.js'></script> <script type="text/javascript" src="/static/js/global.min.js?5.5.53"></script> <script> var _paq = window._paq = window._paq || []; /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ _paq.push(['trackPageView']); _paq.push(['enableLinkTracking']); (function () { var u = "https://tongji.php.cn/"; _paq.push(['setTrackerUrl', u + 'matomo.php']); _paq.push(['setSiteId', '9']); var d = document, g = d.createElement('script'), s = d.getElementsByTagName('script')[0]; g.async = true; g.src = u + 'matomo.js'; s.parentNode.insertBefore(g, s); })(); </script> <script> // top layui.use(function () { var util = layui.util; util.fixbar({ on: { mouseenter: function (type) { layer.tips(type, this, { tips: 4, fixed: true, }); }, mouseleave: function (type) { layer.closeAll("tips"); }, }, }); }); document.addEventListener("DOMContentLoaded", (event) => { // 定义一个函数来处理滚动链接的点击事件 function setupScrollLink(scrollLinkId, targetElementId) { const scrollLink = document.getElementById(scrollLinkId); const targetElement = document.getElementById(targetElementId); if (scrollLink && targetElement) { scrollLink.addEventListener("click", (e) => { e.preventDefault(); // 阻止默认链接行为 targetElement.scrollIntoView({ behavior: "smooth" }); // 平滑滚动到目标元素 }); } else { console.warn( `Either scroll link with ID '${scrollLinkId}' or target element with ID '${targetElementId}' not found.` ); } } // 使用该函数设置多个滚动链接 setupScrollLink("Article_Details_main1L2s_1", "article_main_title1"); setupScrollLink("Article_Details_main1L2s_2", "article_main_title2"); setupScrollLink("Article_Details_main1L2s_3", "article_main_title3"); setupScrollLink("Article_Details_main1L2s_4", "article_main_title4"); setupScrollLink("Article_Details_main1L2s_5", "article_main_title5"); setupScrollLink("Article_Details_main1L2s_6", "article_main_title6"); // 可以继续添加更多的滚动链接设置 }); window.addEventListener("scroll", function () { var fixedElement = document.getElementById("Article_Details_main1Lmain"); var scrollTop = window.scrollY || document.documentElement.scrollTop; // 兼容不同浏览器 var clientHeight = window.innerHeight || document.documentElement.clientHeight; // 视口高度 var scrollHeight = document.documentElement.scrollHeight; // 页面总高度 // 计算距离底部的距离 var distanceToBottom = scrollHeight - scrollTop - clientHeight; // 当距离底部小于或等于300px时，取消固定定位 if (distanceToBottom <= 980) { fixedElement.classList.remove("Article_Details_main1Lmain"); fixedElement.classList.add("Article_Details_main1Lmain_relative"); } else { // 否则，保持固定定位 fixedElement.classList.remove("Article_Details_main1Lmain_relative"); fixedElement.classList.add("Article_Details_main1Lmain"); } }); </script> </body> </html>