returns id:
className returned "page:frm:pbAddInterfaces:pbTbl:0:j_id63"
if you are getting different results, you may have multiple matches on the page or you may need to switch to an iframe.
try identifying matching objects
List<WebElement> objMatches = driver.findElements(By.xpath("//span[contains(text(),'Account')]"));
or see if object exists in an iframe and if so, switch to iframe first.