MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */

var textinput = null;

$(function () {
        textinput = $('#mw-bllength');
	$('#mw-beastx-pitchcalc').html('<input type="button" id="myButton" onclick="myFunction()" value="Calculate">');
}());

function myFunction() {
if (textinput != null)
{
       textinput.value = 'OK';
}
};