1.0Learn JavaScript Online | Free Interactive JavaScript Tutorialshttps://javascript-tutor.netLiew Voon Kionghttps://javascript-tutor.net/index.php/author/ajt7051jct/rich600338<blockquote class="wp-embedded-content" data-secret="qbGZ5JeYgL"><a href="https://javascript-tutor.net/index.php/2011/04/16/lesson-20-ready/">Lesson 20 for our JavaScript Tutorial is Now Ready!</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://javascript-tutor.net/index.php/2011/04/16/lesson-20-ready/embed/#?secret=qbGZ5JeYgL" width="600" height="338" title="“Lesson 20 for our JavaScript Tutorial is Now Ready!” — Learn JavaScript Online | Free Interactive JavaScript Tutorials" data-secret="qbGZ5JeYgL" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://javascript-tutor.net/wp/wp-includes/js/wp-embed.min.js </script> We now have twenty lessons in our Javascript Tutorial! we will strive to compile more lessons in the future. Thanks for your support. Please click on the link below to view lesson 20. http://javascript-tutor.net/java_tutor/javascript20.htm