Oracle Enterprise Manager 11g input username and password Click "Login" button did not respond, nor error, what is the reason?

Check the settings in the Tnsnames.ora file as if there is no problem, with Sqlplus can also operate normally ORCL

Problem found, in fact, can be simple, https://localhost:1158/em/console/logon/logon#, I use is IE8 open this address, and later notice that the lower left corner of the status bar shows there are "errors on the page" prompt, Then use Firefox to open, enter a user name and password, login is normal. The reason is IE8 in parsing this page, some JS code parsing error, I think this is related to the Monopoly Overlord standard, and many of his rules do not meet international standards. So it's more secure to have more browsers on a computer. But thank you for your kind help!