选择特定下拉列表时，显示电子邮件ID字段无效

Under Label responsibility select box if i choose others then i have to get an email id input box otherwise it should be hidden. But the email id field under the div i.e showMe, is showing on selecting Individual as well as others but not supervisors. I want it show only for others.I have Tried many combinations but I have no clue why this may not be working . Any clue why this is not working?Under Label responsibility select box if i choo