I am developing a news site, where I have two content blocks. One for the Image and one for the list of article links. I need to develop a functionality through which on hover of the article link the image linked to that article should be displayed in the image block. By default the image linked to the first article should be shown. I am not really sure which module I should use for this requirement. I am quite new to drupal but I have been learning it quickly. I have completed creating my custom theme. But now, I need some help in creating these functionalities. Any help is highly appreciated. Thanks in advance.