/*******************	添加cookie	**********************/
function addCookie(objName,objValue,objHours)	
{	var str = objName + "=" + escape(objValue);
	if(objHours > 0)	//为0时不设定过期时间，浏览器关闭时cookie自动消失
	{	var date = new Date();
		var ms = objHours*3600000;
		date.setTime(date.getTime() + ms);
		str += "; expires=" + date.toGMTString();
	}
	document.cookie = str;
}
function getCookie(objName)
{	var arrStr = document.cookie.split("; ");
	for(var i = 0;i < arrStr.length;i ++){
		var temp = arrStr[i].split("=");
		if(temp[0] == objName) return unescape(temp[1]);
	} 
}
function delCookie(name)
{	var date = new Date();
	date.setTime(date.getTime() - 10000);
	document.cookie = name + "=a; expires=" + date.toGMTString();
}
function allCookie()
{	var str = document.cookie;
	if(str == "")
	{	str = "没有保存任何cookie";	}
	alert(str);
}