expires参数属性

DHTML文档教程

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Sets or retrieves the expiration date of data persisted with the userdata behavior.

dhtml语法

xml	n/a
scripting	userdata.expires [ = sutcstring ]

dhtml可能的值

sUTCString

String that specifies or receives the expiration date in UTC (Universal Time Coordinate) format.

The property is read/write. The property has no default value.

Remarks

The expires property designates the amount of time that persisted information is available. Microsoft® Internet Explorer removes the persisted information when the browser checks the date and the designated time has expired.

DHTML代码范例

This example uses the expires property to set the expiration date of persisted data to one minute after the information is persisted.

<STYLE>
.userData { behavior: url(#default#userdata)}
</STYLE>
<SCRIPT>
function fnSave(){
var oTimeNow = new Date(); // Start Time
oTimeNow.setMinutes(oTimeNow.getMinutes() + 1);
var sExpirationDate = oTimeNow.toUTCString();
oPersistDiv.expires = sExpirationDate;
oPersistDiv.setAttribute("sData",oPersistText.value);
// Save the persistence data as "sTimeout".
oPersistDiv.save("sTimeout");
}
</SCRIPT>
:
<DIV CLASS = "userData" ID=oPersistDiv onsave = "fnSave()" >
<INPUT TYPE=text ID=oPersistText>

是否符合公共标准

There is no public standard that applies to this property.

Applies To

	userData

更多语法参考

Introduction to Persistence