Cookies操作

/***********************************************************
 * 参数(name,value,days)
 * cookies(name) 读取名为name的值
 * cookies(name,value) 设置name为cookies,加参数days指定过期天数
 * cookies() ==document.cookie
 ***********************************************************/
function cookies(name,value,days){
	if(arguments.length<1)return document.cookie;
	else if(arguments.length<2){
		var arr=document.cookie.split(';');
		for(i=0;i<arr.length;i++){
			var n=arr[i].split('=');
			if(n[0].trim()==name.trim())return n[1];
		}
		return "";
	}
	else{
		var expires = "";
		if(!isNaN(parseInt(days))){
	        var date = new Date();
	        date.setTime(date.getTime()+(parseInt(days)*24*60*60*1000));
	        expires = "; expires="+date.toGMTString();
	    }
	    document.cookie = name+"="+value+expires+"; path=/";
	    return true;
	}
	return false;
}

 /***********************************************************
 * 参数(name,value,days)
 * cookies(name) 读取名为name的值
 * cookies(name,value) 设置name为cookies,加参数days指定过期天数
 * cookies() ==document.cookie
 ***********************************************************/