jQuery : Check image exist or not on location

<script type="text/javascript">

function imageExists(url, callback) {
    var img = new Image();
    img.onload = function() { callback(true); };
    img.onerror = function() { callback(false); };
    img.src = url;
}

function onload(id) /*This function will use while Mouseover event */
{
         var imageUrl = "Image File URL";
         imageExists(imageUrl, function(exists) {
if(exists==true){
/*Something Code here*/
}else{
                        /*Something Code here*/
                }
        });
}

</script>