function showT()
{
		var a = document.getElementsByName("radiob1");
		for(i=0;i<a.length;i++)
		{
		if(a[i].checked)
		{
			if (a[i].value==2) 
			{
					for(k=0;k<PMT1.length;k++)
					{
						PMT1.item(k).style.display = "none";
					}
			}
			else 
			{
					for(k=0;k<PMT1.length;k++)
					{
						PMT1.item(k).style.display = "";
					}
			}
		
		}
		}
}