封锁window.open打开的窗口

关闭window.open打开的窗口
window.open("oa/main/middle_elink.jsp","_blank","height=120,width=350,scrollbars=no,resizable=yes,left=231,top=196,status=no,toolbar=no,menubar=no");


window.opener=null;
window.open('','_self');
window.close();