锚上的动态id没有在其他锚上发射最后一个锚php js pdo

<div class="headerimage"><img src="images/events.png"/></div>
    <?php
    foreach (LoadEvent() as $value){
    echo '<div class="dynamicsidemenu eventback">';
    echo "<a class=\"event\"id=" .$value['eventsearchresultid']. " href='/go.html?url=#' value=" .$value['eventsearchresultid']. ">".$value['eventsearchresultwhat']."</a>";
    echo "<br/>\n";
    echo $value['eventsearchresultwhen'];
    echo "<br/>\n";
    echo $value['eventsearchresultwhere'];
    echo '</div>';
    }
    ?>

$(document).ready(function(){
    var id = $(".event").attr("value");
    var a = document.getElementById(id);
    a.addEventListener("click", function(event){
    event.preventDefault();
    alert(this.getAttribute(id));
    //var $id = this.getAttribute("value");
    $('#leftcolumncontainer').load('pages/upcomingeventsmenu.php');
    $('#middlecolumncontainer').load('pages/upcomingeventscontent.php?id=' + id );
    });
});
<div class="headerimage"><img src="images/event