//检测浏览器是否支持Cookie
function checkCookie(){
	//判断cookie是否开启
	var cookieEnabled=(navigator.cookieEnabled)? true : false;

	//如果浏览器不是ie4+或ns6+
	if (typeof navigator.cookieEnabled=="undefined" && !cookieEnabled){
		document.cookie="testcookie";
		cookieEnabled=(document.cookie=="testcookie")? true : falsedocument.cookie="";
	}
	
	//如果没有开启
	if(cookieEnabled){
		return true;
	}else{
		return false;
	}
}

//增加Cookie
function addCookie(name,value,expireHours){
	var cookieString=name+"="+escape(value);
	//判断是否设置过期时间
	if(expireHours>0){
		var date=new Date();
		date.setTime(date.getTime+expireHours*3600*1000);
		cookieString=cookieString+"; expire="+date.toGMTString();
	}
	document.cookie=cookieString;
}

//获取Cookie值
function getCookie(name){
	var strCookie=document.cookie;
	var arrCookie=strCookie.split("; ");
	for(var i=0;i<arrCookie.length;i++){
		var arr=arrCookie[i].split("=");
		if(arr[0]==name){
			return unescape(arr[1]);
		}
	}
	return false;
}

//删除Cookie
function deleteCookie(name){
	var date=new Date();
	date.setTime(date.getTime()-10000);
	document.cookie=name+"=; expire="+date.toGMTString();
}