jQuery Knob

• canvas based ; no png or jpg sprites.
• touch, mousewheel, keyboard events implemented.
• downward compatible ; overloads an input element.

Example

<input type="text" value="75" class="dial">

<script>
$(function() {
    $(".dial").knob();
}
</script>

Options

Options are provided as attributes 'data-option':

<input type="text" class="dial" data-min="-50" data-max="50">

or in the "knob()" call :

$(".dial").knob({
                'min':-50
                ,'max':50
                })

The following options are supported :

Behaviors :

• min : min value || default=0.
• max : max value || default=100.
• stopper : stop at 0 & 100 on keydown/mousewheel || default=true.
• readOnly : disable input and events.
• angleOffset: change the 0 position of the knob (in degree), || default=0.

UI :

• cursor : display mode "cursor" | default=gauge.
• thickness : gauge thickness.
• width : dial width.
• displayInput : default=true | false=hide input.
• displayPrevious : default=false | true=displays the previous value with transparency.
• fgColor : foreground color.
• bgColor : background color.
• ticks : number of ticks | 0=disable.
• tickColor.
• tickLength.
• tickWidth.
• tickColorizeValues : colorize ticks.
• skin : default | "tron".

Read more:https://github.com/aterrien/jQuery-Knob