ajax统计html页面点击次数

function count_hit(){
 var article_id=document.getElementById('article_id');
 
 
 var url="../../count.php?article_id="+article_id.value;
 var ajax=InitAjax();
 var sh12=document.getElementById('hitcount');
 
 ajax.open("GET",url,true);
 ajax.(){
  if(ajax.readyState==4 && ajax.status==200){
   
   sh12.innerHTML=ajax.responseText;
   
   }
  
  }
 
 ajax.send(null);
 
 }
 
<td>浏览次数:<div id="hitcount"></div></td>
 
 
function count_hit($id){
    global $db;
    $sql="update {$this->tablename} set article_hitcount=article_hitcount+1 where article_id=".$id;
    $db->query($sql);
    $rt=$db->search("{$this->tablename}","article_hitcount","article_id=".$id,2);
    echo $rt['article_hitcount'];
    
   }
 
 
 
 
<?
include_once("inc/mall.inc.start.php");
include_once('smarty.inc.php');
$article->tablename=$conf['news_article_info'];
$article->count_hit($_GET['article_id']);
?>