fixed issue: The position of menu is error in demo (rightClickMenu.html)

demo/cn/super/rightClickMenu.html

@@ -67,6 +67,9 @@
 				$("#m_check").show();
 				$("#m_unCheck").show();
 			}
+
+            y += document.body.scrollTop;
+            x += document.body.scrollLeft;
             rMenu.css({"top":y+"px", "left":x+"px", "visibility":"visible"});
 
 			$("body").bind("mousedown", onBodyMouseDown);

demo/en/super/rightClickMenu.html

@@ -67,6 +67,9 @@
 				$("#m_check").show();
 				$("#m_unCheck").show();
 			}
+
+            y += document.body.scrollTop;
+            x += document.body.scrollLeft;
             rMenu.css({"top":y+"px", "left":x+"px", "visibility":"visible"});
 
 			$("body").bind("mousedown", onBodyMouseDown);