var xmlHttpDbRa;
function createXMLHttpRequestDbRa()
{
    if(window.ActiveXObject)
    {
    xmlHttpDbRa=new ActiveXObject("Microsoft.XMLHTTP");
    }
    else if(window.XMLHttpRequest)
    {
    xmlHttpDbRa=new XMLHttpRequest();
    }
}
function startRequestDbRa(isbn)
{ 
var t=new Date();
var y = t.getYear();
var m = t.getMonth();
var d = t.getDay();
var h = t.getHours();
var x = t.getMinutes();
var s = t.getSeconds();
var ms=t.getMilliseconds(); 

createXMLHttpRequestDbRa();
xmlHttpDbRa.onreadystatechange=headleStateChangeDbRa;            
var urlDbRa="/info/douban/rating/?isbn="+isbn+"&time="+y+m+d+h+x+s+ms;                 
xmlHttpDbRa.open("GET",urlDbRa,true);
xmlHttpDbRa.send(null);                  
}
function headleStateChangeDbRa()
{                
    if(xmlHttpDbRa.readyState==4)
    {       
        if(xmlHttpDbRa.status==200)
        {              
            document.getElementById("doubanRating").innerHTML=xmlHttpDbRa.responseText;
        }
    }                            
}