将picurl的值赋值为图片地址，可以是网络图片地址或本地临时路径图片,时间调用savePic()函数
function savePic(){
var picurl= $("#picurl").attr("src");
//alert(picurl);...
将picurl的值赋值为图片地址，可以是网络图片地址或本地临时路径图片,时间调用savePic()函数
function savePic(){
var picurl= $("#picurl").attr("src");
//alert(picurl);
savePicture(picurl);
}
var triggerEvent = "touchstart";
function savePicture(Url){
var blob=new Blob([''], {type:'application/octet-stream'});
var url = URL.createObjectURL(blob);
var a = document.createElement('a');
a.href = Url;
a.download = Url.replace(/(.*\/)*([^.]+.*)/ig,"$2").split("?")[0];
var e = document.createEvent('MouseEvents');
e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
a.dispatchEvent(e);
URL.revokeObjectURL(url);
}
