javascript如何自动关闭窗口

function CloseWin() //这个不会提示是否关闭浏览器   

{   

window.opener=null;   

//window.opener=top;   

window.open("","_self");   

window.close();   

}

function open_complex_self() {   

  var obj_window = window.open('close.html', '_self');   

  obj_window.opener = window;   

  obj_window.focus();   

 }

window.close();

//普通带提示关闭

function closeie(){

window.close();

}

//关闭IE6不提示

function closeie6(){

window.opener=null;

window.close();

}

//关闭IE7不提示

function closeie7(){

window.open('','_top');

window.top.close();

}