Add sss

sss

@@ -0,0 +1,31 @@
+document.addEventListener("DOMContentLoaded", function () {
+            document.getElementById("userForm").addEventListener("submit", function (event) {
+                let isValid = true;
+                let requiredFields = document.querySelectorAll(".required");
+
+                requiredFields.forEach(field => {
+                    if (field.value.trim() === "") {
+                        isValid = false;
+                        field.style.border = "2px solid red";
+                        let errorSpan = field.nextElementSibling;
+                        if (!errorSpan || !errorSpan.classList.contains("error-message")) {
+                            errorSpan = document.createElement("span");
+                            errorSpan.classList.add("error-message");
+                            errorSpan.style.color = "red";
+                            errorSpan.textContent = "This field is required";
+                            field.parentNode.insertBefore(errorSpan, field.nextSibling);
+                        }
+                    } else {
+                        field.style.border = "";
+                        let errorSpan = field.nextElementSibling;
+                        if (errorSpan && errorSpan.classList.contains("error-message")) {
+                            errorSpan.remove();
+                        }
+                    }
+                });
+
+                if (!isValid) {
+                    event.preventDefault();
+                }
+            });
+        });