Radio buttons will be always one of the options. It is a widely accepted standard.
Trying to select more than one radio button defeats its original purpose.
<input type="radio"> defines a radio button. Radio buttons let a user select ONLY ONE of a limited number of choices.
Please refer to W3Schools for more details: http://www.w3schools.com/html/html_forms.asp
Official W3C specififcation: http://www.w3.org/TR/html401/interact/forms.html
Multiple selection lists are also very standard. Cmd-Click (Mac) and Ctrl-Click (Windows and Linux) is used to check the options.
The multiple attribute is a boolean attribute.
When present, it specifies that multiple options can be selected at once.
Selecting multiple options vary in different operating systems and browsers:
- For windows: Hold down the control (ctrl) button to select multiple options
- For Mac: Hold down the command button to select multiple options
Because of the different ways of doing this, and because you have to inform the user that multiple selection is available, it is more user-friendly to use checkboxes instead.Please refer to W3Schools for more details: http://www.w3schools.com/tags/att_select_multiple.asp