例子
<html>
<head>
</head>
<script language="javascript">
function inf(){
try{
newwin.document.body.innerHTML='';
newwin.document.write('使用旧窗口')
newwin.focus()
}
catch(x){
newwin=window.open('','','width=100,height=100')
newwin.document.write('开了一个新窗口,第一次提示')
newwin.focus()
}
}
</script>
<input type=button value=弹出提示 onclick="inf()">
<html>
<head>
</head>
<script language="javascript">
function inf(){
try{
newwin.document.body.innerHTML='';
newwin.document.write('使用旧窗口')
newwin.focus()
}
catch(x){
newwin=window.open('','','width=100,height=100')
newwin.document.write('开了一个新窗口,第一次提示')
newwin.focus()
}
}
</script>
<input type=button value=弹出提示 onclick="inf()">
<head>
</head>
<script language="javascript">
function inf(){
try{
newwin.document.body.innerHTML='';
newwin.document.write('使用旧窗口')
newwin.focus()
}
catch(x){
newwin=window.open('','','width=100,height=100')
newwin.document.write('开了一个新窗口,第一次提示')
newwin.focus()
}
}
</script>
<input type=button value=弹出提示 onclick="inf()">
<head>
</head>
<script language="javascript">
function inf(){
try{
newwin.document.body.innerHTML='';
newwin.document.write('使用旧窗口')
newwin.focus()
}
catch(x){
newwin=window.open('','','width=100,height=100')
newwin.document.write('开了一个新窗口,第一次提示')
newwin.focus()
}
}
</script>
<input type=button value=弹出提示 onclick="inf()">
function test()
{
var a =null
if(a && a.open && !a.closed)
a .focus()
else
a = window.open("confirm.jsp","Herman","height=100,width=250,titlebar=no");}
</script>
<body onload="test()">
var a =null
function test()
{
if(a && a.open && !a.closed)
a .focus()
else
a = window.open("confirm.jsp","Herman","height=100,width=250,titlebar=no");}
</script>
<body onload="test()">