function destorySession(host,permit) {
	ajaxDestorySessionId(host,permit);
}
//销毁sessionId和cookie，直接注销退出
function ajaxDestory(host,permit) {
	var url = host+'/destoryWindowDestorySessionAction.action?permit='+permit+'&random='+Math.random();
	new Ajax.Request(
		url,
		{
			method: 'POST',
			onSuccess:  function(originalRequest) {
				//window.close();
			},
			onFailure : function(originalRequest) {
				alert("退出时注销会话失败！");
			}
		}
	);
}
//只销毁sessionId，只限制账号的多个会话登陆，不注销退出
function ajaxDestorySessionId(host,permit) {
	var url = host+'/destoryWindowSessionIdDestorySessionAction.action?permit='+permit+'&random='+Math.random();
	new Ajax.Request(
		url,
		{
			method: 'POST',
			onSuccess:  function(originalRequest) {
				//window.close();
			},
			onFailure : function(originalRequest) {
				alert("退出时注销会话失败！");
			}
		}
	);
}