如何在selenium中检测是否通过ajax加载了javascript文件的加载？

My main page loading another page via ajax. Which has javascript file. How do i detect whether that ajax page loading is completed in selenium ? I can check for element loaded. But there are links which are not clickable till that javascript file in inner page is loaded completely. How do i make sure those links are not clickable ? My main page loading another page via ajax. Whi