window.top[_CACHE]实现多个jsp页面共享一个js对象

var share = { 

/ 
 跨框架数据共享接口 
 @param {String} 存储的数据名 
 @param {Any} 将要存储的任意数据(无此项则返回被查询的数据) 
/ 
data: function (name, value) { 
var  = window., 
cache = ['_CACHE'] || {}; 
['_CACHE'] = cache; 

return value !== undefined ? cache[name] = value : cache[name]; 
}, 

/ 
 数据共享删除接口 
 @param {String} 删除的数据名 
/ 
removeData: function (name) { 
var cache = window.['_CACHE']; 
if (cache && cache[name]) delete cache[name]; 
} 
};

window.['_CACHE'] = chatFrdList; 
window.['_CACHE'][frdUserId] = frdUserId;

<pre name="code" class="javascript" style="margin-:0px; margin-bottom:0px; padding:0px; font-family:'courier new',courier,monospace">var e = document.getElementsByName("chatWindow");</pre><pre name="code" class="javascript" style="margin-:0px; margin-bottom:0px; padding:0px; font-family:'courier new',courier,monospace">var keyId = e[0].id; 
delete window.['_CACHE'][keyId];// 关闭与该好友的聊天窗口时，将其从聊天表中移除</pre>