How to get selenium to wait for ajax response?

Question

How can I get selenium to wait for something like a calendar widget to load? Right now I am just doing a Thread.sleep(2500) after exporting the test case to a junit program.

Answer 1

You could use

waitForElementPresent(locator)

Which will wait until the element present in the document object model 

To check the visibility of element use the following code

 waitForElementHeight(locator)