Ajax is not a language it stands for Asynchronous Javascript over XML. So technically they are saying Javascript. However there is a server side component to AJAX which could be a variety of other languages (Java, Python, PHP, etc).
The most common languages requested of the university by employers are things like ASP, VB strains and PL/SQL. We send a lot of students out to COBOL shops as well. You can train a monkey to code COBOL. COBOL is still the best batch program language.