/*
GetCookie(name) 获取Cookies方法 ，name为名字
SetCookie(name,value,interval,number,[path],[domain],[secure]) 设置cookies方法
name 名称，value cookies值，interval（"y" 年,"q"季,"m"月,"d"日,"h"时,"M"分,"s"秒，默认：日），number：数量级
[path],[domain],[secure] 可缺省。
DelCookie(name) 删除设置过期cookies ， name：cookies名称
*/
function GetCookieVal(offset)
{
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
	endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie(name)
{
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen){
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
		return GetCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break;
	}
	return null;
}

function DelCookie(name)
{
	var exp = new Date();
	exp.setTime (exp.getTime() - 1);
	var cval = GetCookie (name);
	document.cookie = name + "=" + cval + "; expires="+ exp.toGMTString();
}

function SetCookie(name, value,interval,number)
{
	if (interval == "0") return false;
	var expdate = new Date();
	var argv = SetCookie.arguments;
	var argc = SetCookie.arguments.length;
	var expires = DateAdd(interval,number,expdate);
	var path = (argc > 4) ? argv[4] : null;
	path="/";
	var domain = (argc > 5) ? argv[5] : null;
	var secure = (argc > 6) ? argv[6] : false;
	// + path
	domain=".renmaiku.com";
	document.cookie = name + "=" + escape (value) +((expires == null) ? "" : ("; expires="+ expires.toGMTString()))
	+((path == null) ? "" : ("; path=/")) +((domain == null) ? "" : ("; domain=" + domain))
	+((secure == true) ? "; secure" : "");
}

function DateAdd(interval,number,date)
{
	switch(interval)
	{
		case "y":{
			date.setFullYear(date.getFullYear()+number);
			return date;
			break;
		}
	case "q":{
			date.setMonth(date.getMonth()+number*3);
			return date;
			break;
		}
	case "m":{
			date.setMonth(date.getMonth()+number);
			return date;
			break;
		}
	case "w":{
			date.setDate(date.getDate()+number*7);
			return date;
			break;
		}
	case "d":{
			date.setDate(date.getDate()+number);
			return date;
			break;
		}
	case "h":{
			date.setHours(date.getHours()+number);
			return date;
			break;
		}
	case "M":{
			date.setMinutes(date.getMinutes()+number);
			return date;
			break;
		}
	case "s":{
			date.setSeconds(date.getSeconds()+number);
			return date;
			break;
		}
		case "0":{
			return date;
			break;
		}
	}
}