jquery 有关问题

<script type="text/javascript" language="JavaScript">
    $(document).ready(function(){
    var x = 10;
    var y = 20;
    $(".imagelink").mouseover(function(e){
    var imgtip = "<div id ='imgtip'><img src ='" + this.href + "'alt='' /></div>";
    $("body").append(imgtip);
    $("#imgtip").css({
        "top": (e.pageY+y) + "px",
        "left":(e.pageX+x) + "px"
    }).show('fast');
    
    }).mouseout(function(){
    $("#imgtip").remove();
    });
});
</script>