function download(){

var _width = $('#card_info').width(),

_height = $('#card_info').height();

 

var canvas = document.createElement("canvas");

var scale = 4; //放大倍数

canvas.width = _width * scale;

canvas.height = _height * scale;

canvas.getContext("2d").scale(scale, scale);

document.body.scrollTop = document.documentElement.scrollTop = 0;

var w = $('#card_info').outerWidth(),

h = $('#card_info').outerHeight();

html2canvas($('#card_info'),{

useCORS: true,

scale: scale,

canvas: canvas,

width: _width,

heigth: _height,

dpi: window.devicePixelRatio * 96,

onrendered: function(canvas) {

document.body.appendChild(canvas);

$("canvas").hide();

$(".tips_cont").hide();

$(".content,.cont_btn").show();

convertCanvasToImage(canvas);

}

});

function convertCanvasToImage(canvas) {

var image = new Image();

image.setAttribute("crossOrigin",'Anonymous');

image.src = canvas.toDataURL();

$(".pic img").attr({"src":image.src}).css({"width":"5.77rem","height":"8.52rem"});

$(".pic").show();

$("#card_info").hide();

return image;

}

}