1.html5中的canvas标签的创建
window.onload = function(){
createCanvas();
} function createCanvas(){ var canvas_width= 200, canvas_height = 200;
document.body.innerHTML = "";
}2.HTML5Canvas标签绘制图形
var canvas_width= 500, canvas_height = 500;var mycanvas, context;
window.onload = function(){
createCanvas();
drawRect();
} function createCanvas(){
document.body.innerHTML = "";
mycanvas = document.getElementById("mycanvas");
context = mycanvas.getContext("2d");
}
function drawRect(){
context.fillStyle ="#FF0000"; //context.rotate(45);//旋转45度
//context.translate(200,200);//移动
//context.scale(2,0.5);//缩放
context.fillRect(0,0,200,200);
}3.HTML5Canvas标签绘制图片
jQuery单页全屏垂直滚动特效代码
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非常实用的jQuery单页全屏垂直滚动特效代码，如今非常流行的特效代码，常用于产品功能介绍或者项目简介，此款jQuery插件滚动还是比较流畅，有些插件需要页面滚动到位才能切换页面，此特效还是比较流畅的。插件强大的自定义参数功能，支持手机端触屏以及支持切换的速度，值得学习使用。
var canvas_width= 500, canvas_height = 500;var mycanvas, context;
window.onload = function(){
createCanvas();
drawImage();
} function createCanvas(){
document.body.innerHTML = "";
mycanvas = document.getElementById("mycanvas");
context = mycanvas.getContext("2d");
}
function drawImage(){ var img = new Image();
img.onload = function(){
context.drawImage(img,0,0);
}
img.src = "1.png";
}
