[Mrs.Haneki]

function ClearSearchFields(searchDeliverySector) {
	    $('#searchDeliverySector').focus(function () {
	        $('span.btn-clear').show();
	        $('#searchDeliverySector').val('');
	    });

	    $('#searchDeliverySector').blur(function () {
	        $('span.btn-clear').hide();
	    });
	}

правильно написала?