把下面的代码放到Application.cfm文件里就能使SESSION变量在浏览器关闭时失效,想不明白??

<cfif IsDefined("cookie.CFID"

AND IsDefined("cookie.CFToken">
<cfset variables.CFID=cookie.CFID>
<cfset variables.CFToken=cookie.CFToken>
<cfcookie name="CFID" value=variables.CFID>
<cfcookie name="CFToken" value=variables.CFToken>
</cfif>