function download2(id){
$.jBox.tip("正在下载，请稍后...",'loading',{opacity:0.5,persistent:true});
var url = '${ctx}/bus/getFile?fileId='+id;
var iframe = document.getElementById("download_");
if (null == iframe) {
alert('没有iframe');
}
iframe.src = url;
checkReadyState();
}
function checkReadyState() {
var iframe = document.getElementById("download_");
var iframeDoc = iframe.contentDocument || iframe.contentWindow.document;
if (iframeDoc.readyState == 'complete' || iframeDoc.readyState == 'interactive') {
$.jBox.closeTip();
return;
} else {
//继续监测
setTimeout(checkReadyState, 1000);
}
}
<iframe id="download_" style="display: none"></iframe>
仅支持ie
