isVisible() - It is a legacy method of selenium RC. If an element is made invisible by setting the CSS "visibility" property to "hidden", or the "display" property to "none", either for the element itself or one if it's ancestors then this method will fail.
IisDisplayed - It is a method of selenium 2 and further versions. This method ignores the CSS style attribute and looks for the presence/absence of an element on webpage.
isEnabled() - It is used to check if any element is enabled or not
IisDisplayed - It is a method of selenium 2 and further versions. This method ignores the CSS style attribute and looks for the presence/absence of an element on webpage.
isEnabled() - It is used to check if any element is enabled or not
