Use $ ("#codeId"). AddClass ("error"); $ ("#codeId"). HTML ("Login cannot be empty"); Add HTML code to the front end effect not coming out?

$ ("#codeId"). AddClass ("error");

$ ("#codeId"). HTML ("Login name cannot be empty");

To determine if the check-in name is empty, the message "Login cannot be blank" is the reason why the effect does not appear:

1. Determine that jquery has been introduced and effective

2. Confirm that the selected ID is correct

3, $ ("#codeId"). HTML ("Login name cannot be empty");

4. Ensure that the "hidden" attribute is removed, these $ ("#nameId"). AddClass ("Error"), $ ("#nameId"). HTML ("Login cannot be empty"); "Color:white" priority is greater than $ ("# NameId "). AddClass (" error "), high so to remove the" Color:white "of $ (" #nameId "). AddClass (" error "), the effect will come out.

JSP page code:

Style $ ("#nameId") to be added through jquery. addclass ("error");

Use $ ("#codeId"). AddClass ("error"); $ ("#codeId"). HTML ("Login cannot be empty"); Add HTML code to the front end effect not coming out?