Language: JavaScript
Label: safe
CWE: CWE-79 \u2014 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Code:
function toggleWriteability(id_of_patient, checked) {
    document.getElementById(id_of_patient).disabled = checked;
}