function preload()
{
	for (var i=0; i<18; i++)
	{
		im[i] = new Image();
	}
	im[0].src = 'images/buttons/button1_1.jpg';
	im[1].src = 'images/buttons/button1_2.jpg';
	im[2].src = 'images/buttons/button1_3.jpg';
	im[3].src = 'images/buttons/button2_1.jpg';
	im[4].src = 'images/buttons/button2_2.jpg';
	im[5].src = 'images/buttons/button2_3.jpg';
	im[6].src = 'images/buttons/button3_1.jpg';
	im[7].src = 'images/buttons/button3_2.jpg';
	im[8].src = 'images/buttons/button3_3.jpg';
	im[9].src = 'images/buttons/button4_1.jpg';
	im[10].src = 'images/buttons/button4_2.jpg';
	im[11].src = 'images/buttons/button4_3.jpg';
	im[12].src = 'images/buttons/button5_1.jpg';
	im[13].src = 'images/buttons/button5_2.jpg';
	im[14].src = 'images/buttons/button5_3.jpg';
	im[15].src = 'images/buttons/button6_1.jpg';
	im[16].src = 'images/buttons/button6_2.jpg';
	im[17].src = 'images/buttons/button6_3.jpg';
}