The meter element shows a value displayed in the context of the range of possible values.

It has local attributes: value, min, max, low, high, optimum, form .

The min and max attributes set the bounds for the range of possible values. These can be expressed using floating-point numbers.

The display for the meter element can be broken into three segments: too low, too high, and just right.

The low attribute sets the value under which a value is considered to be too low.

The high attribute sets the value over which a value is considered to be too high.

The optimum attribute specifies the "just right" value.

	      	<!DOCTYPE HTML>
			<meter id="mymeter" value="90" min="10" max="100" low="40" high="80" optimum="60"></meter>
			<button type="button" value="30">30</button>
			<button type="button" value="60">60</button>
			<button type="button" value="90">90</button>
			var buttons = document.getElementsByTagName('BUTTON');
			var meter = document.getElementById('mymeter');
			for (var i = 0; i < buttons.length; i++) {
			buttons[i].onclick = function(e) {
			meter.value =;