![Allow only AlphaNumeric ( Alphabets and Numbers) characters and space only in TextBox using Javascript Allow only AlphaNumeric ( Alphabets and Numbers) characters and space only in TextBox using Javascript](https://www.aspsnippets.com/Handlers/DownloadFile.ashx?File=4e071b68-df5b-44f0-b358-e1814a3715dc.png)
Allow only AlphaNumeric ( Alphabets and Numbers) characters and space only in TextBox using Javascript
Error: The name can only contain underscores and alphanumeric characters. It must begin with a letter and be unique, and must not include spaces, end with an underscore, or contain two consecutive
![labels - How to clearly state to the User what characters are valid - User Experience Stack Exchange labels - How to clearly state to the User what characters are valid - User Experience Stack Exchange](https://i.stack.imgur.com/qG5bt.png)
labels - How to clearly state to the User what characters are valid - User Experience Stack Exchange
![labels - How to clearly state to the User what characters are valid - User Experience Stack Exchange labels - How to clearly state to the User what characters are valid - User Experience Stack Exchange](https://i.stack.imgur.com/3eP50.png)