Turn selectability on or off via jQuery

jquery.selectable.js

  // Selectability: pass true or false
  // http://stackoverflow.com/questions/2700000/how-to-disable-text-selection-using-jquery
  $.fn.selectable = (function _selectable(){
    var values = [
      // Off
      ['on', 'none', false],
      // On
      ['off','text', $.noop]
    ];
    
    return function select(boolean){
      var value = values[~~boolean];
  
      return this
        .attr('unselectable', value[0])
        .css( 'user-select',  value[1])
        .on(  'selectstart',  value[2]);
      };
    };
  ());