批量下载

arr=["下载地址","234","234"]
function downfile(){
	//启动下载
   download_list(arr)
}
function download_list(arr) {
	console.log(arr)
	arr=arr.toString() //转字符串
   var downloadList = arr.split(",");
   //a放到页面
   downloadList.forEach(function (url) {
        var downloadUrl = url;
        var a = document.createElement('a');
        $(a).addClass('J_ack')
        a.href = downloadUrl;
        $('body').append(a); // 修复firefox中无法触发click
   })
   //调用下载
   $('body').find("a.J_ack").each(function (i) {
        downfileByFileId($('body').find("a.J_ack")[i].href, i);
   });  
   //5分钟之后删除
   setTimeout(function () {
        $('.J_ack').remove();
        $('.downloadList').remove();
   }, 5 * 60 * 1000);
} 
function downfileByFileId(fileId, i) {
    var loadFrameEm = '<iframe class="downloadList" src="' + fileId + '" style="display:none;"></iframe>'; 
    $(document.body).append(loadFrameEm);
}