function showfield()
{
      if(document.Form1.b1.checked == true)
      {
            document.getElementById("1").style.display="block";
      }
      else
      {
            document.getElementById("1").style.display="none";      
      }
      if(document.Form1.b2.checked == true)
      {
            document.getElementById("2").style.display="block";
      }
      else
      {
            document.getElementById("2").style.display="none";      
      }
	     if(document.Form1.b3.checked == true)
      {
            document.getElementById("3").style.display="block";
      }
      else
      {
            document.getElementById("3").style.display="none";      
      }
	     if(document.Form1.b4.checked == true)
      {
            document.getElementById("4").style.display="block";
      }
      else
      {
            document.getElementById("4").style.display="none";      
      }
	     if(document.Form1.b5.checked == true)
      {
            document.getElementById("5").style.display="block";
      }
      else
      {
            document.getElementById("5").style.display="none";      
      }
	  
	  
}