var http_request=false;
var http_url = 'http://www.nonb.cn';

function send_request(url){
    http_request=false;
    if(window.XMLHttpRequest){
         http_request=new XMLHttpRequest();
             if(http_request.overrideMimeType){//设置MIME类别
              http_request.overrideMimeType("text/xml");
        }
     }else if(window.ActiveXObject){
            try{
              http_request=new ActiveXObject("Msxml2.XMLHttp");
             }catch(e){
              try{
              http_request=new ActiveXobject("Microsoft.XMLHttp");
              }catch(e){}
             }
    }
        if(!http_request){
         window.alert("创建XMLHttp对象失败！");
         return false;
        }
        http_request.onreadystatechange=processrequest;
        http_request.open("GET",url,true);
        http_request.send(null);
}

function processrequest(){
    if (http_request.readyState==1) {
          document.getElementById('block_comment').innerHTML="<img src="+http_url+"/ajax/loading.gif> 正在加载...";
    }
    if(http_request.readyState==4){
         if(http_request.status==200){
              document.getElementById('block_comment').innerHTML=http_request.responseText;
         }else{
            alert("您所请求的页面不正常！");
         }
    }
}
function send(obj){
    var f=document.book;
    var nickname=f.nickname.value;
    var comment=f.comment.value;
    var blog_id=f.blog_id.value;
    if(nickname==""||comment==""){
        document.getElementById(obj).innerHTML="<font color=red>请填写完整！</font>";
        return false;
    }else{
        var send_url = http_url+'/ajax/comments.php?nickname='+nickname+'&comment='+comment+'&blog_id='+blog_id;
        //alert(send_url);
        send_request(send_url);
        reobj=obj;
    }
}