Javascript关闭窗口提示
<script language="javascript" type="text/javascript">
var g_blnCheckUnload = true;
function RunOnBeforeUnload()
{
if(g_blnCheckUnload)
{
window.event.returnValue = 'You will lose any unsaved content';
}
}
function bypassCheck()
{
g_blnCheckUnload = false;
}
onbeforeunload=RunOnBeforeUnload;
</script>
</head>
<body onbeforeunload="RunOnBeforeUnload()">