function onPointer(x)
		{
			//alert(x);
			if (document.getElementById)
			{ // DOM3 = IE5, NS6
				document.getElementById(x).style.visibility = 'visible';
			}
			else
			{
				if (document.layers)
				{ // Netscape 4
					switch (x)
					{
					  case 't0':
							document.t0.visibility = 'visible';
							break;
						case 't1':
							document.t1.visibility = 'visible';
							break;
						case 't2':
							document.t2.visibility = 'visible';
							break;
						case 't3':
							document.t3.visibility = 'visible';
							break;
						case 't4':
							document.t4.visibility = 'visible';
							break;
					
					}
				}
				else
				{ // IE 4
					switch (x)
					{
					  case 't0':
							document.all.t0.style.visibility = 'visible';
							break;
						case 't1':
							document.all.t1.style.visibility = 'visible';
							break;
						case 't2':
							document.all.t2.style.visibility = 'visible';
							break;
						case 't3':
							document.all.t3.style.visibility = 'visible';
							break;
						case 't4':
							document.all.t4.style.visibility = 'visible';
							break;
					
					}
				}
			}
		}
		function offPointer()
		{
			if (document.getElementById)
			{ // DOM3 = IE5, NS6
			  document.getElementById('t0').style.visibility = 'hidden';
				document.getElementById('t1').style.visibility = 'hidden';
				document.getElementById('t2').style.visibility = 'hidden';
				document.getElementById('t3').style.visibility = 'hidden';
				document.getElementById('t4').style.visibility = 'hidden';
				
			}
			else
			{
				if (document.layers)
				{
				  document.t0.visibility = 'hidden';
					document.t1.visibility = 'hidden';
					document.t2.visibility = 'hidden';
					document.t3.visibility = 'hidden';
					document.t4.visibility = 'hidden';
					
				}
				else
				{
				  document.all.t0.style.visibility = 'hidden';
					document.all.t1.style.visibility = 'hidden';
					document.all.t2.style.visibility = 'hidden';
					document.all.t3.style.visibility = 'hidden';
					document.all.t4.style.visibility = 'hidden';
					
				}
			}
		}