关闭窗口时保存数据的办法

<HTML>
<HEAD>
<STYLE>
.storeuserData {behavior:url(#default#userData);}
</STYLE>
<SCRIPT>
function fnSaveInput()
{
var oPersist=oPersistForm.oPersistInput;
oPersist.setAttribute("sPersist",oPersist.value);
oPersist.save("oXMLBranch");
}
function fnLoadInput()
{
var oPersist=oPersistForm.oPersistInput;
oPersist.load("oXMLBranch");
var v=oPersist.getAttribute("sPersist");
if(v)
oPersist.value = v;
}
</SCRIPT>
</HEAD>
<BODY onload="fnLoadInput()">
<FORM ID="oPersistForm" action="http://localhost:5200/admin/">
<textarea CLASS="storeuserData" ID="oPersistInput" onchange="fnSaveInput()"></textarea>
<input type="submit">
</FORM>
</BODY>
</HTML>