Javascript关闭页面无提示信息的问题

Javascript关闭页面无提示信息的问题

今天遇到这么一个问题:


解决方法：

<! DOCTYPE HTML PUBLIC  " -//W3C//DTD HTML 4.0 Transitional//EN " >
< HTML >
  < HEAD >
   < TITLE >  New Document  </ TITLE >
   < META NAME = " Generator "  CONTENT = " EditPlus " >
   < META NAME = " Author "  CONTENT = "" >
   < META NAME = " Keywords "  CONTENT = "" >
   < META NAME = " Description "  CONTENT = "" >
  </ HEAD >
< script language = " javascript " >
function  custom_close(){
if  (confirm( " 您确定要关闭本页吗？ " )){
window.opener = null ;
window.open('','_self');
window.close();
}
else {}
}
</ script >
  < BODY >
   < a href = " javascript:custom_close(); " > close </ a >
  </ BODY >
</ HTML >