function setCookie(name,value)
{
	var nameString = name + "=" + value;
    var expires = new Date();
	expires.setTime(expires.getTime() + 3 * 30 * 24 * 60 * 60 * 1000);
	
	var expiryString = ";expires=" + expires.toGMTString();
	document.cookie = nameString + expiryString;
}

function getCookie (name) 
{
	var cookieString = document.cookie;
	var start = cookieString.indexOf(name + '=');
    if (start == -1) return "";	

    start += name.length + 1;
    var end = cookieString.indexOf(';', start);
    
    if (end == -1) return unescape(cookieString.substring(start));
    return unescape(cookieString.substring(start, end));
}

function setBook(spbs)
{
    var books_counter = getCookie("bookuu_counter");
    if(books_counter=="")  //还没有浏览过
    {
       setCookie("bookuu_counter",1);
       setCookie("bookuu_books_"+spbs,1);
       return;
    }
        
    var book_counter = getCookie("bookuu_books_"+spbs);
    if(book_counter!="") //如果有重复的，次数加1
    {
    	setCookie("bookuu_books_"+spbs,parseInt(book_counter)+1);
    	return;
    }
    
    setCookie("bookuu_counter",parseInt(book_counter)+1);
    setCookie("bookuu_books_"+spbs,1);
}