An Ajax runtime can be added to an existing Static and Dynamic Web projects. Select the project and in the right click menu select "Properties". Under "Project Facets" press the "Modify Project..." button. Add the Ajax facet press the "Next>" button. Select an Ajax runtime and press "Finish"
Once an AJAX project has been created, the project will contain all the necessary AJAX artifacts to develop an AJAX web application.
Related tasks
Creating a new Project with AJAX