按钮实现A标签新窗口打开（不用window.open）

<button type="button" onclick="goBaidu()">click</button>
<script> 
    function goBaidu(){
        var a = document.createElement('a');
        var e = document.createEvent('MouseEvents');
        e.initEvent( 'click', true, true );
        a.href="http://www.baidu.com";
        a.target="_blank";
        a.dispatchEvent(e);
    }
</script>