function array_rand ( input, num_req ) {	// Pick one or more random entries out of an array
	// 
	// +   original by: _argos

	var Indexes = [];
	var Ticks = num_req || 1;
	var Check = {
		Duplicate	: function ( input, value ) {
			var Exist = false, Index = 0;
			while ( Index < input.length ) {
				if ( input [ Index ] === value ) {
					Exist = true;
					break;
				}
				Index++;
			}
			return Exist;
		}
	};

	if ( input instanceof Array && Ticks <= input.length ) {
		while ( true ) {
			var Rand = Math.floor ( ( Math.random ( ) * input.length ) );
			if ( Indexes.length === Ticks ) { break; }
			if ( !Check.Duplicate ( Indexes, Rand ) ) { Indexes.push ( Rand ); }
		}
	} else {
		Indexes = null;
	}

	return ( ( Ticks == 1 ) ? Indexes.join ( ) : Indexes );
}