Test left to right popup list box's width is restricted within the left screen.
   -  Setup dual screens.
-  Launch browser and maximize the browser window size in the left screen.
-  Enter a very long string into "Left to right" text input box.
-  Hit enter. 
-  Go back and start to enter the same string again.
-  Make sure the popup list box's width which suggests the result doesn't exceed the left screen width. 
Test right to left popup window width is restricted within the right screen.
   -  Setup dual screens.
-  Launch browser and maximize the browser window size in the right screen.
-  Enter a very long string into "Right to Left" text input box.
-  Hit enter.
-  Go back and start to enter the same string again.
-  Make sure the popup list box's width which suggests the result doesn't exceed the right screen width.
Test left to right select window width is restricted within the left screen.
   -  Setup dual screens.
-  Launch browser and maximize the browser window size in the left screen.
-  Click the following <select> item.
-  Make sure the drop-down box width in the following <select> doesn't exceed the left screen width.
Test right to left select window width is restricted within the right screen.
   -  Setup dual screens.
-  Launch browser and maximize the browser window size in the right screen.
-  Click the following <select> item.
-  Make sure the drop-down box width in the following <select> doesn't exceed the right screen width.