Getting errors after opening a downloaded project in NetBeans

Hi i am recieving the following errors after opening a sample example downloaded...some jars i think are missing ...cannot locate them

"jsfsupport-designtime" library could not be found

"webui-designtime" library could not be found

"jsfsupport-runtime" library could not be found

"webui-runtime" library could not be found

"jdbcsupport-runtime" library could not be found

"jsfsupport-designtime" library could not be found

"exceptionhandler-runtime" library could not be found

[525 byte] By [@developer@] at [2007-11-26 9:30:44]