Safari Does Not Load Script

Hi, everybody. I have a question about my browser. I love using Safari but the browser has been acting up lately. For example, Safari failed to load a script on a website. I have double-checked to make sure that settings are all enabled (Java, Adobe Flash Player, etc.). In the end, Safari still couldn't load the script. However, Opera browser did it just fine. Similar things happened to other web pages on Safari. What is the problem and how can I fix it?