function createCookie(name,value,days) { 
    if (days) { 
        var date = new Date(); 
        date.setTime(date.getTime()+(days*24*60*60*1000)); 
        var expires = "; expires="+date.toGMTString(); 
    } 
    else var expires = ""; 
    document.cookie = name+"="+escape(value)+expires+"; path=/"; 
} 
  
function readCookie(name) { 
    var nameEQ = name + "="; 
    var ca = document.cookie.split(';'); 
    for(var i=0;i < ca.length;i++) { 
        var c = ca[i]; 
        while (c.charAt(0)==' ') c = c.substring(1,c.length); 
        if (c.indexOf(nameEQ) == 0) return unescape(c.substring(nameEQ.length,c.length)); 
    } 
    return null; 
} 
  
function eraseCookie(name) { 
    createCookie(name,"",-1); 
} 
  
function showCookie(name) { 
    alert(readCookie(name)); 
} 
  
  
function addCookie(name,value,days) { 
    if (readCookie(name) != null) { 
        var oldvalue = readCookie(name); 
        var newvalue = oldvalue+","+value; 
    } 
    else var newvalue = value; 
    createCookie(name,newvalue,days); 
} 
  
function getHistory() { 
    var sHistory = readCookie("viewhistory"); 
    var res ="";
    var aItem = "";
    var sPath ="";
    if(sHistory) { 
        var aHistroy = sHistory.split(","); 
        for (x in aHistroy) 
        { 
            aItem = aHistroy[x].split("|");
            sPath = '/html' + Math.ceil(aItem['1']/100);
            res += '<li><a href="http://www.tcmlib.com/'+aItem['0']+ sPath +'/showdetail-'+aItem['2']+'.html">'+aItem['3']+'</a></li>';
        } 
    } 
    return res;
}

function clearhistory() {
    eraseCookie("viewhistory");    
    document.getElementById("search_history").innerHTML = "";
}

function showHistory() {
    var res = getHistory();
    var content = "<h4><span>访问历史</span></h4>";
    if(res) {
        var content = '<h4><span>访问历史　 [<a href="javascript:clearhistory();">清除</a>]</span></h4><ul>'+ res +'</ul>';
    }
    document.getElementById("search_history").innerHTML = content;
}