Ticket #2430: overflow.patch

src/fx.js

@@ -69 +69 @@
         return this.animate({opacity: to}, speed, callback);
     },
     
-    animate: function( prop, speed, easing, callback ) {
+    animate: function( prop, speed, easing, callback, changeOverflow ) {
         var optall = jQuery.speed(speed, easing, callback);
+        // default value of change overflow is true
+        changeOverflow = typeof(changeOverflow) == "undefined" ?  true : changeOverflow;
 
         return this[ optall.queue === false ? "each" : "queue" ](function(){
             if ( this.nodeType != 1)
@@ -92 +94 @@
                 }
             }
 
-            if ( opt.overflow != null )
+            if ( changeOverflow && opt.overflow != null )
                 this.style.overflow = "hidden";
 
             opt.curAnim = jQuery.extend({}, prop);