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 top = window.top, 
cache = top['_CACHE'] || {}; 
top['_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.top['_CACHE']; 
if (cache && cache[name]) delete cache[name]; 
} 

};

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

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