INPUT Range Description:
The range INPUT tag allows you to request a numerical value in your form where the exact number isn't important. Browsers that support it should display a slider for selecting the number. By using the min and max attributes, web developers can control the input. By default, the browser will display a range slider that sends values from 0 to 100.
DTD: HTML5: <!doctype html>
INPUT Range Web Browser Support:
At this time, only Opera 9+ and Safari 5+ support the INPUT range type with a slider (see screen shot above). All other browsers display a text box. You can still use this input type, you will just have to validate that the contents are a number with a script or CGI.
INPUT Range Attributes:
INPUT Range Usage:
Standard range input tag
See an example of a standard range input tag.
INPUT Range Special Notes:
The input range tag is only supported in Opera 9+ and Safari 5+ if you want a slider displayed, but you can still use this input type and validate that the submitted data is a number. That way, when other browsers do start supporting it, your forms won't have to be modified.