带画布的HTML5中的逐帧动画
要使用画布在HTML5中创建逐帧动画，请尝试运行以下代码：
var myImageNum = 1;
var lastImage = 5;
var context = canvas.getContext('2d');
var img = new Image;
img.onload = function(){
context.clearRect( 0, 0, context.canvas.width, context.canvas.height );
context.drawImage( img, 0, 0 );
};
var timer = setInterval( function(){
if (myImageNum > lastImage){
clearInterval( timer );
}else{
img.src = "images/left_hnd_"+( myImageNum++ )+".png";
}
}, 1000/15 );