function nr1() {
      if (document.all) { 
        document.all['nr1'].style.visibility='visible'; 
        document.all['nr2'].style.visibility='hidden'; 
        document.all['nr3'].style.visibility='hidden';
        document.all['nr4'].style.visibility='hidden';
		document.all['nr5'].style.visibility='hidden';
      } else { 
        document.getElementById('nr1').style.visibility = 'visible'; 
        document.getElementById('nr2').style.visibility = 'hidden'; 
        document.getElementById('nr3').style.visibility = 'hidden'; 
        document.getElementById('nr4').style.visibility = 'hidden'; 
		document.getElementById('nr5').style.visibility = 'hidden';
      } 
    }
  
    function nr2() {
      if (document.all) { 
        document.all['nr1'].style.visibility='hidden'; 
        document.all['nr2'].style.visibility='visible'; 
        document.all['nr3'].style.visibility='hidden';
        document.all['nr4'].style.visibility='hidden';
		document.all['nr5'].style.visibility='hidden';
      } else { 
        document.getElementById('nr1').style.visibility = 'hidden'; 
        document.getElementById('nr2').style.visibility = 'visible'; 
        document.getElementById('nr3').style.visibility = 'hidden'; 
        document.getElementById('nr4').style.visibility = 'hidden'; 
		document.getElementById('nr5').style.visibility = 'hidden';
      } 
    }
  
    function nr3() {
      if (document.all) { 
        document.all['nr1'].style.visibility='hidden'; 
        document.all['nr2'].style.visibility='hidden'; 
        document.all['nr3'].style.visibility='visible';
        document.all['nr4'].style.visibility='hidden';
		document.all['nr5'].style.visibility='hidden';
      } else { 
        document.getElementById('nr1').style.visibility = 'hidden'; 
        document.getElementById('nr2').style.visibility = 'hidden'; 
        document.getElementById('nr3').style.visibility = 'visible'; 
        document.getElementById('nr4').style.visibility = 'hidden'; 
		document.getElementById('nr5').style.visibility = 'hidden';
      } 
    }
  

    function nr4() {
      if (document.all) { 
        document.all['nr1'].style.visibility='hidden'; 
        document.all['nr2'].style.visibility='hidden'; 
        document.all['nr3'].style.visibility='hidden';
        document.all['nr4'].style.visibility='visible';
		document.all['nr5'].style.visibility='hidden';
      } else { 
        document.getElementById('nr1').style.visibility = 'hidden'; 
        document.getElementById('nr2').style.visibility = 'hidden'; 
        document.getElementById('nr3').style.visibility = 'hidden'; 
        document.getElementById('nr4').style.visibility = 'visible'; 
		document.getElementById('nr5').style.visibility = 'hidden';
      } 
    }


	function nr5() {
      if (document.all) { 
        document.all['nr1'].style.visibility='hidden'; 
        document.all['nr2'].style.visibility='hidden'; 
        document.all['nr3'].style.visibility='hidden';
        document.all['nr4'].style.visibility='hidden';
		document.all['nr5'].style.visibility='visible';
      } else { 
        document.getElementById('nr1').style.visibility = 'hidden'; 
        document.getElementById('nr2').style.visibility = 'hidden'; 
        document.getElementById('nr3').style.visibility = 'hidden'; 
        document.getElementById('nr4').style.visibility = 'hidden';
		document.getElementById('nr5').style.visibility = 'visible';
      } 
    }