问JavaScript "this“不适用于HTML元素

EN

         $row = mysqli_fetch_array($result);

          $firstname = $row['firstname'];

          $lastname = $row['lastname'];

          $image =    $row['image'];

          $phone =    $row['phone'];

          $email =    $row['email'];

     $realtorData = $firstname.'|'.$lastname.'|'.$phone.'|'.$email.'|';
echo "<img src='/../../Realtors/$image'onmouseover='showRealtorInfo(this,\"".$realtorData."\" );' onmouseout='hideRealtorInfo();'>";

  function showRealtorInfo(element, realtorInfo)
{
    var realtorArray = realtorInfo.split('|');

    var firstname = realtorArray[0];
    var lastname  = realtorArray[1];
    var phone     = realtorArray[2];
    var email     = realtorArray[3];

    var realtorInfoDiv = document.getElementById('realtorinfo');

    var myHTML  = "<p><b>" + firstname + " " + lastname + "</b><br /><br />";
        myHTML += "Phone: " + phone + "<br />";
        myHTML += "Email: " + email + "<br />";

    realtorInfoDiv.innerHTML = myHTML;

    x = element.offsetLeft;
    y = element.offsetTop;

    //alert(x);

    realtorInfoDiv.style.left = y + 100;
    realtorInfoDiv.style.top = x + 550;



    realtorInfoDiv.style.visibility = 'visible';


}

#realtorinfo{

position: absolute;
left: 10px;
top: 10px;
width: 200px;
height: 150px;
padding: 5px;
background-color: yellow;
visibility: hidden;
float: left;

}