示例使用HTML5的canvas标签和Javascript脚本，简单的编写了装载图片效果，请使用支持HTML5的浏览器预览效果：
下图为以逐渐横向栅格的效果图
html部分：
XML/HTML Code复制内容到剪贴板
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>html5 装载图片</title>
</head>
<body>
<button onclick="drawImg1()">从左到右</button>
<button onclick="drawImg2()">从中央到左右两边</button>
<button onclick="drawImg3()">以逐渐横向栅格</button>
<hr/>
<canvas class="canvas" id="canvas" width="600" height="300"></canvas>
</body>
</html>
JavaScript部分：
XML/HTML Code复制内容到剪贴板
//初始化
var canvas = document.getElementById("canvas"),
context = canvas.getContext("2d"),
image = new Image();
image.src = "img/test.jpg";
//从左到右加载方法
function drawImg1(){
var drawWidth = 0,
interval = setInterval(function(){
context.drawImage(image, 0, 0, drawWidth, image.height, 0, 0, drawWidth, image.height);
drawWidth += 20;
if(drawWidth > canvas.width) clearInterval(interval);
},100);
}
//从中央向左右两边拉开加载方法
function drawImg2(){
var drawWidth = 0,
drawLeft = canvas.width/2,
interval = setInterval(function(){
context.drawImage(image, drawLeft, 0, drawWidth, image.height, drawLeft, 0, drawWidth, image.height);
drawWidth += 20;
drawLeft -= 10;
if(drawLeft < 0) clearInterval(interval);
