function CookieClass(){
	this.expires = 0 ; //有效时间,以分钟为单位
	this.path = "/"; //设置访问路径
	this.domain = ""; //设置访问主机
	this.secure = false; //设置安全性
	
	this.setCookie = function(name,value){
		var str = name+"="+escape(value);
		if (this.expires>0){ //如果设置了过期时间
			var date=new Date();
			var ms=this.expires * 60 * 1000; //每分钟有60秒，每秒1000毫秒
			date.setTime(date.getTime()+ms);
			str+="; expires="+date.toGMTString();
		}
		if(this.path!="")str+="; path="+this.path; //设置访问路径
		if(this.domain!="")str+="; domain="+this.domain; //设置访问主机
		if(this.secure!="")str+="; true"; //设置安全性
		document.cookie=str;
	}

	this.getCookie=function(name){
		var cookieArray=document.cookie.split("; "); //得到分割的cookie名值对
		var cookie=new Object();
		for(var i=0;i<cookieArray.length;i++){
			var arr=cookieArray[i].split("="); //将名和值分开
			if(arr[0]==name)return unescape(arr[1]); //如果是指定的cookie，则返回它的值
		}
		return "";
	}

	this.deleteCookie=function(name){
		var date=new Date();
		var ms= 1 * 1000;
		date.setTime(date.getTime() - ms);
		var str = name+"=no; expires=" + date.toGMTString(); //将过期时间设置为过去来删除一个cookie
		document.cookie=str;
	}

	this.showCookie=function(){
		alert(unescape(document.cookie));
	}
}