Ticket #13821: 13821.5.diff

Index: wp-admin/js/post.js
===================================================================
--- wp-admin/js/post.js (revision 23176)
+++ wp-admin/js/post.js (working copy)
@@ -371,6 +371,16 @@
                stamp = $('#timestamp').html();
                visibility = $('#post-visibility-display').html();
 
+               function updatePasswordSubmitability() { 
+                       var post_password = jQuery.trim($('#post_password').val()); 
+                       if ( post_password == '' ) { 
+                               $('.save-post-visibility', '#post-visibility-select').addClass('button-disabled'); 
+                       } else { 
+                               $('.save-post-visibility', '#post-visibility-select').removeClass('button-disabled'); 
+                               $('#post_password').removeClass('form-invalid'); 
+                       }
+               }
+
                function updateVisibility() {
                        var pvSelect = $('#post-visibility-select');
                        if ( $('input:radio:checked', pvSelect).val() != 'public' ) {
@@ -380,12 +390,16 @@
                                $('#sticky-span').show();
                        }
                        if ( $('input:radio:checked', pvSelect).val() != 'password' ) {
-                               $('#password-span').hide();
+                               $('#password-span').hide();                              
+                               $('.save-post-visibility', '#post-visibility-select').removeClass('button-disabled'); 
                        } else {
                                $('#password-span').show();
+                               updatePasswordSubmitability(); 
                        }
                }
-
+               // disable submit button based on password field content 
+               $('#post_password').keyup(function() {updatePasswordSubmitability();});
+               
                function updateText() {
 
                        if ( ! $('#timestampdiv').length )
@@ -487,6 +501,13 @@
                $('.save-post-visibility', '#post-visibility-select').click(function () { // crazyhorse - multiple ok cancels
                        var pvSelect = $('#post-visibility-select');
 
+                       if ( $('.save-post-visibility', pvSelect).hasClass('button-disabled') ) { 
+                               $('#post_password').addClass('form-invalid'); 
+                               return false; 
+                       } else { 
+                               $('#post_password').removeClass('form-invalid'); 
+                       } 
+
                        pvSelect.slideUp('fast');
                        $('.edit-visibility', '#visibility').show();
                        updateText();