it is too late to stop closing the window when you are in onunload, try onbeforeunload, here is an example (from MSDN documentation)<HTML>
<HEAD>
<SCRIPT>
function closeIt()
{
event.returnValue = "Any string value here forces a dialog box to appear before closing the window.";
}
</SCRIPT>
</HEAD>
<BODY onbeforeunload="closeIt()">
<a href="http://www.microsoft.com">Click here to navigate to www.microsoft.com</a>
</BODY>
</HTML>
<HEAD>
<SCRIPT>
function closeIt()
{
event.returnValue = "Any string value here forces a dialog box to appear before closing the window.";
}
</SCRIPT>
</HEAD>
<BODY onbeforeunload="closeIt()">
<a href="http://www.microsoft.com">Click here to navigate to www.microsoft.com</a>
</BODY>
</HTML>
function closeIt()
{
event.returnValue = "hahaha.";
confirm("");
}
他会先执行confirm("");我如何改变执行顺序,我要的是这个目的
</body>
<script for=window event=onbeforeunload>
if ((event.clientX > document.body.clientWidth && event.clientY < 0)||event.altKey)
{
return ("确定要关闭吗?")
}
</script>
直接使用onbeforeunload的坏处是如果你刷新页面或者导向新页也会弹出警告窗口
你必须对onclick事件返回的值判断,否则js不会理你,不知道说明白了没有;
1.
<body>
<script>
function document.onmouseover(){
var loEL = document.elementFromPoint(event.clientX,event.clientY);
if (loEL.uniqueID==test.uniqueID)
test.innerHTML = "in";
else
test.innerHTML = "out";
}
</script>
<div id="test" style="width:300;height:150;background:red;overflow:scroll"></div>
</body>
2.
<body>
<script>
function document.onmouseover(){
if (test.contains(window.event.srcElement))
test.innerHTML = "in";
else
test.innerHTML = "out";
}
</script>
<div id="test" style="width:300;height:150;background:red;overflow:scroll"></div>
</body>
var bUnlod = false;function document.onclick()
{
if (event.srcElement.tagName == "A" && event.srcElement.target && event.srcElement.target != "")
bUnload = true;
else
bUnload = false;
}function window.onbeforeunload()
{
event.returnValue = "be careful";
}function window.onunload()
{
alert("I am going to something extra");
doextra();
}function doextra()
{
alert("doing stuffs");
}
</script>
onunload="return closewindow()"
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