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="dXI90PJbIL"><a href="https://javascript-tutor.net/index.php/2011/04/05/lesson-16-javascript-tutorial-ready/">Lesson 16 of JavaScript Tutorial is now ready.</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://javascript-tutor.net/index.php/2011/04/05/lesson-16-javascript-tutorial-ready/embed/#?secret=dXI90PJbIL" width="600" height="338" title="“Lesson 16 of JavaScript Tutorial is now ready.” — Learn JavaScript Online | Free Interactive JavaScript Tutorials" data-secret="dXI90PJbIL" 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 have added yet another lesson in our JavaScript Tutorial. Lesson 16 shows you how to write code for the onChange and the onSelect events. Click the link below to view the new lesson. http://javascript-tutor.net/java_tutor/javascript16.htm