var web_domain = "happigo.com"
//cookie的相关函数
function addCookie(objName,objValue){//添加cookie
	var str = objName + "=" + encodeURIComponent(objValue);
	var exp = new Date(); 
	exp.setTime (exp.getTime()+3600000000); 
	str += "; path=/;domain=."+web_domain+"; expires=" + exp.toGMTString();
	document.cookie = str;
}

function getCookie(objName){//获取指定名称的cookie的值
	var arrStr = document.cookie.split("; ");
	for(var i = 0;i < arrStr.length;i ++){
		var temp = arrStr[i].split("=");
		if(temp[0] == objName) return decodeURIComponent(temp[1]);
	}
	return null;
}

function delCookie(objName){//为了删除指定名称的cookie，可以将其过期时间设定为一个过去的时间
	var date = new Date();
	date.setTime(date.getTime() - 10000);
	document.cookie = name + "=a; expires=" + date.toGMTString();
}