Nevalidni znak "&" ve <script>u?*

<!-- Aktivace jQuery lightBox pluginu -->
<script type="text/javascript">
$(document).ready(function(){   
    if($("#photosAjax").get(0)) {
        $('a.thickbox').lightBox();
        var allPhotos = $("#photosAjax a.fotka");
        var params = "";
        allPhotos.each(function() {
            var e = $(this);
            params += (params ? '&' : '') + e.attr("id") + "=1";
        });
        $.ajax({
            type: "GET",
            url: link,
            data: params,
            success: function(data){
                $("#photosAjax").html(data);
                $('#photosAjax a.fotka').lightBox();
            }, 
            error: function() {
//                alert('Došlo k chybě.');
            }
        });
    } else {
        $('a.thickbox').lightBox();
    }
});
</script>

params += (params ? '&' : '') + e.attr("id") + "=1";

Line 31, Column 25: character "&" is the first character of a delimiter but occurred as data
params += (params ? '&' : '') + e.attr("id") + "=1";

Line 31, Column 25: xmlParseEntityRef: no name 
params += (params ? '&' : '') + e.attr("id") + "=1";