diff --git a/src/page/avisos.js b/src/page/avisos.js
index 1b884e2..4ddcf84 100644
--- a/src/page/avisos.js
+++ b/src/page/avisos.js
@@ -122,10 +122,11 @@ PAGES.avisos = {
         }
       })();
       document.getElementById(btn_guardar).onclick = () => {
-        // Disable button to prevent double-clicking
+        // Check if button is already disabled to prevent double-clicking
         var guardarBtn = document.getElementById(btn_guardar);
         if (guardarBtn.disabled) return;
         
+        // Validate before disabling button
         if (document.getElementById(field_origen).value == "") {
           alert("¡Hay que elegir una persona de origen!");
           return;
@@ -135,6 +136,7 @@ PAGES.avisos = {
           return;
         }
         
+        // Disable button after validation passes
         guardarBtn.disabled = true;
         guardarBtn.style.opacity = "0.5";
         
diff --git a/src/page/supercafe.js b/src/page/supercafe.js
index f78f5c8..80e93c1 100644
--- a/src/page/supercafe.js
+++ b/src/page/supercafe.js
@@ -99,15 +99,17 @@ PAGES.supercafe = {
       }
     });
     document.getElementById(btn_guardar).onclick = () => {
-      // Disable button to prevent double-clicking
+      // Check if button is already disabled to prevent double-clicking
       var guardarBtn = document.getElementById(btn_guardar);
       if (guardarBtn.disabled) return;
       
+      // Validate before disabling button
       if (document.getElementById(field_persona).value == "") {
         alert("¡Hay que elegir una persona!");
         return;
       }
       
+      // Disable button after validation passes
       guardarBtn.disabled = true;
       guardarBtn.style.opacity = "0.5";