# Create the HTML code for DOM-based XSS
html_code = """
<!DOCTYPE html>
<html>
<head>
    <title>DOM Based XSS Demonstration</title>
</head>
<body>

    <h2>University Course Portal</h2>

    <div id="result"></div>

    <script>
        // Read the URL parameters
        const params = new URLSearchParams(window.location.search);

        // Get the course value from the URL
        const course = params.get("course");

        // Insert the URL value into the webpage
        // Vulnerable DOM operation
        document.getElementById("result").innerHTML = course;
    </script>

</body>
</html>
"""

# Create an HTML file
with open("dom_xss.html", "w") as file:
    file.write(html_code)

# Display a completion message
print("DOM-based XSS HTML file created successfully!")
print("Open dom_xss.html in a web browser to test it.")