* ajusted code of droppable.js.

 * rebuilt zui.

dist/js/zui.min.js

@@ -2364,7 +2364,7 @@ if (typeof jQuery === "undefined") { throw new Error("ZUI requires jQuery") }
                 {
                     $targets.removeClass('drop-to');
                 }
-                $targets.each(function(index, el)
+                $targets.each(function(index)
                 {
                     var t = $(this);
                     var tPos = t.offset();
@@ -2981,7 +2981,7 @@ if (typeof jQuery === "undefined") { throw new Error("ZUI requires jQuery") }
          var hl = $('html').attr('lang');
          lang = hl? hl : 'en';
      }
-     return lang.replace(/-/, '_').toLowerCase();
+     return lang.replace('-', '_').toLowerCase();
   }
 
   /**
@@ -3074,7 +3074,7 @@ if (typeof jQuery === "undefined") { throw new Error("ZUI requires jQuery") }
       }
 
       if (!button.className) {
-        if (total <= 2 && index === total-1) {
+        if (total == 1 || (total >= 2 && key === 'confirm')) {
           // always add a primary to the main option in a two-button dialog
           button.className = "btn-primary";
         } else {
@@ -3219,7 +3219,7 @@ if (typeof jQuery === "undefined") { throw new Error("ZUI requires jQuery") }
   exports.confirm = function() {
     var options;
 
-    options = mergeDialogOptions("confirm", ["cancel", "confirm"], ["message", "callback"], arguments);
+    options = mergeDialogOptions("confirm", ["confirm", "cancel"], ["message", "callback"], arguments);
 
     /**
      * overrides; undo anything the user tried to set they shouldn't have
@@ -3262,7 +3262,7 @@ if (typeof jQuery === "undefined") { throw new Error("ZUI requires jQuery") }
     // just because of 'value' and 'inputType' - can we refactor?
     defaults = {
       className: "bootbox-prompt",
-      buttons: createLabels("cancel", "confirm"),
+      buttons: createLabels("confirm", "cancel"),
       value: "",
       inputType: "text"
     };
@@ -3667,12 +3667,12 @@ if (typeof jQuery === "undefined") { throw new Error("ZUI requires jQuery") }
       CONFIRM : "OK"
     },
     zh_cn : {
-      OK      : "OK",
+      OK      : "好的",
       CANCEL  : "取消",
       CONFIRM : "确认"
     },
     zh_tw : {
-      OK      : "OK",
+      OK      : "好的",
       CANCEL  : "取消",
       CONFIRM : "確認"
     }

src/js/droppable.js

@@ -87,7 +87,7 @@
                 {
                     $targets.removeClass('drop-to');
                 }
-                $targets.each(function(index, el)
+                $targets.each(function(index)
                 {
                     var t = $(this);
                     var tPos = t.offset();