1、load事件 javascript
<!DOCTYPE HTML><html> <head> <meta charset="utf-8"><title>img - load event</title></head> <body><img id="img1" src="http://pic1.win4000.com/wallpaper/f/51c3bb99a21ea.jpg"><p id="p1">loading...</p><script type="text/javascript">img1.onload = function() {p1.innerHTML = 'loaded'}</script></body></html>
測試，全部瀏覽器都顯示出了「loaded」，說明全部瀏覽器都支持img的load事件。html
2、readystatechange事件java
<!DOCTYPE HTML><html> <head> <meta charset="utf-8"><title>img - readystatechange event</title></head> <body><img id="img1" src="http://pic1.win4000.com/wallpaper/f/51c3bb99a21ea.jpg"><p id="p1">loading...</p><script type="text/javascript">img1.onreadystatechange = function() {if(img1.readyState=="complete"||img1.readyState=="loaded"){p1.innerHTML = 'readystatechange:loaded'}}</script></body></html>
3、img的complete屬性瀏覽器
<!DOCTYPE HTML><html> <head> <meta charset="utf-8"><title>img - complete attribute</title></head> <body><img id="img1" src="http://pic1.win4000.com/wallpaper/f/51c3bb99a21ea.jpg"><p id="p1">loading...</p><script type="text/javascript">function imgLoad(img, callback) {var timer = setInterval(function() {if (img.complete) {callback(img)clearInterval(timer)}}, 50)}imgLoad(img1, function() {p1.innerHTML('加載完畢')})</script></body></html>
輪詢不斷監測img的complete屬性，若是爲true則代表圖片已經加載完畢，中止輪詢。該屬性全部瀏覽器都支持。ide