var chkIndex = $('#ddlLevel').get(0).selectedIndex - 1;

            alert('chk: ' + chkIndex);            

here i got previous index value using current index, now i want to retrieve item value and item name using that previous index value, my code is 

            var chkValue = $('#ddlLevel').val(chkIndex);

            alert('val: ' + chkValue);

but not able to fetch item value and item name

            // Pass Item Name and Item Value to 2 variable on basis of index value