If you were using Internet Explorer 6 or 7 on a Windows machine or Opera 9, this demo would actually work!
Intro
Validation
Date and time types
Range control
Repetition
Calculated fields
Datalist
Autofocus
Prefilling forms
Roundtripping data
Input mode

Range

The range input type allows to enter value using a slider:

The code looks like this:

<form>
  <input type="range">
</form>

This slider is linked to an output field, which displays the numeric value:

The code looks like this:

<form>
  <input type="range" name="slider1">
  Value: <output onformchange="this.value = form.slider1.value"></output>
</form>

By default, the numeric value of the range control ranges from 0 to 100, with steps of one. This can be changed by setting the min, max and precision attributes.

This slider ranges from 0 to 255, with an initial value of 128:

The tag for the slider control looks like this:

  <input type="range" name="slider2" value="128" min="0" max="255">
Credits: The slider widget is the WebFX Slider Control, written by Erik Arvidsson, slighty adapted to hook into Web Forms 2