function make_invisible(number)
{
   for(x=1;x<=5;x++)
   {
      thislayer = "reply"+number+x;
      
      if(document.layers)
      {
         document.layers[thislayer].visibility="hidden";
         document.layers[thislayer].display="none";
      }
      else if (document.all)
      {
         document.all[thislayer].style.visibility="hidden";
         document.all[thislayer].style.display="none";   
      }
      else
      {
         document.getElementById(thislayer).style.visibility="hidden";
         document.getElementById(thislayer).style.display="none"; 
      }
   }
}

function radioButtonClick(formfield,number)
{
   var replylayer = "reply"+number;

   // ensure an answer has been selected
   
   var answer = 0;   
   
   for(x=0;x<=4;x++)
   {
      if(formfield[x].checked == true)
      {
         answer = formfield[x].value;
         break;
      }
   }
   
   if(answer == 0)
   {
      return;
   }

   replylayer = replylayer+answer;


   // ensure all reply layers are invisible
   
   for(x=1;x<=5;x++)
   {
      thislayer = "reply"+number+x;

      if(document.layers)
      {
         document.layers[thislayer].visibility="hidden";
         document.layers[thislayer].display="none";
      }
      else if (document.all)
      {
         document.all[thislayer].style.visibility="hidden";
         document.all[thislayer].style.display="none";   
      }
      else
      {
         document.getElementById(thislayer).style.visibility="hidden";
         document.getElementById(thislayer).style.display="none"; 
      }
   }
  
   // make visible the appropriate reply
   
   if(document.layers)
   {
         document.layers[replylayer].visibility="show";
         document.layers[replylayer].display="block";        
   }
   else  if (document.all)
   {
         document.all[replylayer].style.visibility="visible";
         document.all[replylayer].style.display="block";
   }
   else
   {
         document.getElementById(replylayer).style.visibility="visible";
         document.getElementById(replylayer).style.display="block";
   }
}