function menu(i)
	{

		var img1 = document.getElementById("menu1");
		var img2 = document.getElementById("menu2");
		var img3 = document.getElementById("menu3");
		var img4 = document.getElementById("menu4");
		var img5 = document.getElementById("menu5");

		switch(i)
		{
			case 0:
				break;
			case 1:
				img1.background = "images/butt_2.gif";
				break;
			case 2:
				img2.background = "images/butt_2.gif";
				break;
			case 3:
				img3.background = "images/butt_2.gif";
				break;
			case 4:
				img4.background = "images/butt_2.gif";
				break;
			case 5:
				img5.background = "images/butt_bl_2.gif";
				break;
			case 10:
				img1.background = "images/butt_1.gif";
				break;
			case 20:
				img2.background = "images/butt_1.gif";
				break;
			case 30:
				img3.background = "images/butt_1.gif";
				break;
			case 40:
				img4.background = "images/butt_1.gif";
				break;
			case 50:
				img5.background = "images/butt_bl_1.gif";
				break;
		}
	}