js打开新的链接下载文件

var p =params.join("&");

var a = document.createElement('a');

a.href = 'report/exportpubcount.do'+p;

a.target = '_blank';

a.id='exppub';

document.body.appendChild(a);

var alink = document.getElementById('exppub');

alink.click();

alink.parentNode.removeChild(a);