DRAG DROP
There is an ASP.NET Web site PassGuideWS.
There is an ASP.NET Web application PassGuideApp.
There is an ASP.NET page PassGuidePage.
There is a text box PassGuideTxt in PassGuidePage.
PassGuideTxt can only have numerical values between 13 and 42.
How can this be ensured?
Answer: 
Explanation:
