Scrolljacking is a feature used in web development to hijack and modify the speed, direction, and overall native behaviour of scrolling on a web page. This research study investigated how scrolljacking can influence the usability and the Universal Design of web pages. Two prototypes were designed and developed as part of this research. One prototype had a non-scrolljacking user interface and the other prototype had the same user interface as the first prototype but with scrolljacking functionality. The two prototypes were evaluated in an experiment with 20 participants’, where they had to perform similar task-driven actions in the two user interfaces. Accuracy, user satisfaction, and speed were some of the main aspects investigated in this experiment. To measure these aspects, the total time to complete the tasks and the number of errors made per task were collected, as well as the scrolljacking familiarity and the participant's opinion about the topics of ease-of-use control, frustration, and fun during the experiment. Data was collected during the experiment and was analysed by using paired t-tests and Wilcoxon signed-rank tests. The data analysis revealed that there was no statistically significant difference in speed between the two user interfaces. However, there was a statistically significant difference in the accuracy and user satisfaction between the two user interfaces, as the interface using scrolljacking had lower accuracy and user satisfaction scores than the non-scrolljacking interface. The research study suggests that scrolljacking negatively influences the usability and the Universal Design of a web page.