diff --git a/public/scripts/manage/season.js b/public/scripts/manage/season.js
index e69de29..82d0204 100644
--- a/public/scripts/manage/season.js
+++ b/public/scripts/manage/season.js
@@ -0,0 +1,14 @@
+const seasonTextbox = document.getElementById('season-textbox');
+const submitButton = document.getElementById('submit-button');
+
+async function checkDataValidity() {
+    let dataIsValid = true;
+    
+    if(seasonTextbox.value == "") dataIsValid = false;
+
+    submitButton.disabled = !dataIsValid;
+}
+checkDataValidity();
+
+seasonTextbox.addEventListener('keyup', checkDataValidity);
+seasonTextbox.addEventListener('change', checkDataValidity);
diff --git a/views/manage/addseason.pug b/views/manage/addseason.pug
index 4050cb2..27783b5 100644
--- a/views/manage/addseason.pug
+++ b/views/manage/addseason.pug
@@ -9,9 +9,9 @@ block content
       span(class='form-section')
         label Ending year
         span(class='form-section-input')
-          input(type="number", name="year", value=currentYear)
+          input#season-textbox(type="number", name="year", value=currentYear)
       span(class='form-section')
-        button#submit-button(type="submit") Submit
+        button#submit-button(type="submit" disabled) Submit
 
 block scripts 
   script(src='/scripts/manage/season.js' type="module")
\ No newline at end of file