มันขึ้น error แบบนี้ครับ 'length' null or not an object

$("input:checkbox").bind( "change", function()
{
		
        if(
		 
        (
		($.inArray('13',religions)>-1 && $("input:checkbox[name='religion'][value='13']").is(':checked')) ||
		($.inArray('12',religions)>-1 && $("input:checkbox[name='religion'][value='12']").is(':checked')) ||
		($.inArray('11',religions)>-1 && $("input:checkbox[name='religion'][value='11']").is(':checked')) ||
		($.inArray('8',religions)>-1 && $("input:checkbox[name='religion'][value='8']").is(':checked')) ||
		($.inArray('7',religions)>-1 && $("input:checkbox[name='religion'][value='7']").is(':checked')) ||
		($.inArray('6',religions)>-1 && $("input:checkbox[name='religion'][value='6']").is(':checked')) ||
		($.inArray('5',religions)>-1 && $("input:checkbox[name='religion'][value='5']").is(':checked')) ||
		($.inArray('4',religions)>-1 && $("input:checkbox[name='religion'][value='4']").is(':checked')) ||
		($.inArray('3',religions)>-1 && $("input:checkbox[name='religion'][value='3']").is(':checked')) ||
		($.inArray('2',religions)>-1 && $("input:checkbox[name='religion'][value='2']").is(':checked')) ||
        ($.inArray('1',religions)>-1 && $("input:checkbox[name='religion'][value='1']").is(':checked')) 
        )
		&&
		(
		($.inArray('red',gradecolor)>-1 && $("input:checkbox[name='grade_h5'][value='red']").is(':checked')) ||
		($.inArray('yellow',gradecolor)>-1 && $("input:checkbox[name='grade_h5'][value='yellow']").is(':checked')) ||
		($.inArray('blue',gradecolor)>-1 && $("input:checkbox[name='grade_h5'][value='blue']").is(':checked')) ||
		($.inArray('green',gradecolor)>-1 && $("input:checkbox[name='grade_h5'][value='green']").is(':checked'))
        )
			
        )
        {
            markersmap[index].setVisible(true);
        }
        else
        {
            markersmap[index].setVisible(false);
        }
});

&&
		(
		($.inArray('red',gradecolor)>-1 && $("input:checkbox[name='grade_h5'][value='red']").is(':checked')) ||
		($.inArray('yellow',gradecolor)>-1 && $("input:checkbox[name='grade_h5'][value='yellow']").is(':checked')) ||
		($.inArray('blue',gradecolor)>-1 && $("input:checkbox[name='grade_h5'][value='blue']").is(':checked')) ||
		($.inArray('green',gradecolor)>-1 && $("input:checkbox[name='grade_h5'][value='green']").is(':checked'))
        )