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Quick port of the jQuery Masked Input Plugin 1.3 to Prototype
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README.markdown
prototype.maskedinput.js
test.htm

README.markdown

MaskedInput Prototype

A port of the jQuery Masked Input Plugin 1.3 to Prototype. The plugin breaks the native change event in the browser. It won't fire unless event.simulate.js is available.

Requires: Prototype >= 1.6.1 Optional: event.simulate.js from http://github.com/kangax/protolicious to trigger native change event. Tested on: Windows - IE6, IE7, IE8, IE9pre, Opera 9.6, Chrome 10, Firefox 3.6, Safari 5; Linux - Opera 10, Chrome 11 beta, Firefox 3.5.

Example code

<input id="test" type="text" size="10" />
<input id="test2" type="text" size="10" />

$$("input").invoke("mask", "99.99.9999");
// or
// $("test", "test2").each(function (e) {e.mask("99.99.9999");});

Placeholder character can be changed and an event can be called when the mask is completed

function finished() {
  // note 'this' points to input element
  alert("Completed " + this.inspect() + " with value " + $F(this));
}
$("test").mask("99.99.9999", {placeholder: "+", completed: finished});

If you need to unmask an element, use the unmask method :)

// apply mask
var element = $('test').mask('99.99.9999');
...
// change mask - useless example
// because unmask() is called internally from mask() anyway
element.unmask().mask('99.99.99');
...
// unmask all inputs
$$("input").invoke("unmask");

The mask definitions can be changed

Element.mask.definitions['a'] = '[A-Z]';

Or new ones can be added

<input id="time1" type="text" class="time" size="5" />
<input id="time2" type="text" class="time" size="5" />

// 1st digit of hours in 24-hours format
Element.mask.definitions['H'] = '[012]';
// 1st digit of minutes
Element.mask.definitions['M'] = '[0-5]';
// mask all time input fields
$$(".time").invoke("mask", "H9:M9");

Find the original jQuery code including supported masks at http://digitalbush.com/projects/masked-input-plugin/

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