function menu (i)
{

	switch(i)
	{
		case 1:
		{
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
			{
				window.document.ta1.visibility="show";
				window.document.ta2.visibility="hide"; 
				window.document.ta3.visibility="hide"; 
				window.document.ta4.visibility="hide"; 
				window.document.ta5.visibility="hide"; 
				window.document.ta6.visibility="hide"; 
				return;
			}
			if (navigator.appVersion.charAt (0)<'5')
			{
				var layers=document.all.tags ("div");
			}
			else 
			{
				var layers=document.getElementsByTagName("div");
			}
			layers[0].style.visibility='visible'; 
			layers[1].style.visibility='hidden';
			layers[2].style.visibility='hidden';
			layers[3].style.visibility='hidden';
			layers[4].style.visibility='hidden';
			layers[5].style.visibility='hidden';
			return;
		}
		case 2:
		{
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
			{
				window.document.ta1.visibility="hide";
				window.document.ta2.visibility="show"; 
				window.document.ta3.visibility="hide"; 
				window.document.ta4.visibility="hide"; 
				window.document.ta5.visibility="hide"; 
				window.document.ta6.visibility="hide"; 
				return;
			}
			if (navigator.appVersion.charAt (0)<'5')
			{
				var layers=document.all.tags ("div");
			}
			else 
			{
				var layers=document.getElementsByTagName("div");
			}
			layers[0].style.visibility='hidden'; 
			layers[1].style.visibility='visible';
			layers[2].style.visibility='hidden';
			layers[3].style.visibility='hidden';
			layers[4].style.visibility='hidden';
			layers[5].style.visibility='hidden';
			return;
		}
		case 3:
		{
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
			{
				window.document.ta1.visibility="hide";
				window.document.ta2.visibility="hide"; 
				window.document.ta3.visibility="show"; 
				window.document.ta4.visibility="hide"; 
				window.document.ta5.visibility="hide"; 
				window.document.ta6.visibility="hide"; 
				return;
			}
			if (navigator.appVersion.charAt (0)<'5')
			{
				var layers=document.all.tags ("div");
			}
			else 
			{
				var layers=document.getElementsByTagName("div");
			}
			layers[0].style.visibility='hidden'; 
			layers[1].style.visibility='hidden';
			layers[2].style.visibility='visible';
			layers[3].style.visibility='hidden';
			layers[4].style.visibility='hidden';
			layers[5].style.visibility='hidden';
			return;
		}
		case 4:
		{
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
			{
				window.document.ta1.visibility="hide";
				window.document.ta2.visibility="hide"; 
				window.document.ta3.visibility="hide"; 
				window.document.ta4.visibility="show"; 
				window.document.ta5.visibility="hide"; 
				window.document.ta6.visibility="hide"; 
				return;
			}
			if (navigator.appVersion.charAt (0)<'5')
			{
				var layers=document.all.tags ("div");
			}
			else 
			{
				var layers=document.getElementsByTagName("div");
			}
			layers[0].style.visibility='hidden'; 
			layers[1].style.visibility='hidden';
			layers[2].style.visibility='hidden';
			layers[3].style.visibility='visible';
			layers[4].style.visibility='hidden';
			layers[5].style.visibility='hidden';
			return;
		}
		case 5:
		{
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
			{
				window.document.ta1.visibility="hide";
				window.document.ta2.visibility="hide"; 
				window.document.ta3.visibility="hide"; 
				window.document.ta4.visibility="hide"; 
				window.document.ta5.visibility="show"; 
				window.document.ta6.visibility="hide"; 
				return;
			}
			if (navigator.appVersion.charAt (0)<'5')
			{
				var layers=document.all.tags ("div");
			}
			else 
			{
				var layers=document.getElementsByTagName("div");
			}
			layers[0].style.visibility='hidden'; 
			layers[1].style.visibility='hidden';
			layers[2].style.visibility='hidden';
			layers[3].style.visibility='hidden';
			layers[4].style.visibility='visible';
			layers[5].style.visibility='hidden';
			return;
		}
		case 6:
		{
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
			{
				window.document.ta1.visibility="hide";
				window.document.ta2.visibility="hide"; 
				window.document.ta3.visibility="hide"; 
				window.document.ta4.visibility="hide"; 
				window.document.ta5.visibility="hide"; 
				window.document.ta6.visibility="show"; 
				return;
			}
			if (navigator.appVersion.charAt (0)<'5')
			{
				var layers=document.all.tags ("div");
			}
			else 
			{
				var layers=document.getElementsByTagName("div");
			}
			layers[0].style.visibility='hidden'; 
			layers[1].style.visibility='hidden';
			layers[2].style.visibility='hidden';
			layers[3].style.visibility='hidden';
			layers[4].style.visibility='hidden';
			layers[5].style.visibility='visible';
			return;
		}
		case 7:
		{
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5'))
			{
				window.document.ta1.visibility="hide";
				window.document.ta2.visibility="hide"; 
				window.document.ta3.visibility="hide"; 
				window.document.ta4.visibility="hide"; 
				window.document.ta5.visibility="hide"; 
				window.document.ta6.visibility="hide"; 
				return;
			}
			if (navigator.appVersion.charAt (0)<'5')
			{
				var layers=document.all.tags ("div");
			}
			else 
			{
				var layers=document.getElementsByTagName("div");
			}
			layers[0].style.visibility='hidden'; 
			layers[1].style.visibility='hidden';
			layers[2].style.visibility='hidden';
			layers[3].style.visibility='hidden';
			layers[4].style.visibility='hidden';
			layers[5].style.visibility='hidden';
			return;
		}

	}
}