用html2canvas在HTML5下将网页生成图片

html2canvas可以获取页面的DOM元素，将其生成图片，示例代码如下：

html2canvas(document.body,  {
    allowTaint: true,
    aintTest: false,
    onrendered: function(canvas)  {
        var img = canvas.toDataURL();
        var newImg = document.createElement("img");
        newImg.src =  img;
        document.body.appendChild(newImg);
    }

}