function gotab(n)
  {
	  switch(n){
            case 1:
			document.getElementById("s1").style.display="block";
			document.getElementById("s2").style.display="none";
			document.getElementById("s3").style.display="none";
			document.getElementById("s4").style.display="none";
			document.getElementById("s5").style.display="none";						
			break;		  
		  
            case 2:
			document.getElementById("s1").style.display="none";
			document.getElementById("s2").style.display="block";
			document.getElementById("s3").style.display="none";
			document.getElementById("s4").style.display="none";
			document.getElementById("s5").style.display="none";						
			break;
            case 3:
			document.getElementById("s1").style.display="none";
			document.getElementById("s2").style.display="none";
			document.getElementById("s3").style.display="block";
			document.getElementById("s4").style.display="none";
			document.getElementById("s5").style.display="none";						
			break;
            case 4:
			document.getElementById("s1").style.display="none";
			document.getElementById("s2").style.display="none";
			document.getElementById("s3").style.display="none";
			document.getElementById("s4").style.display="block";
			document.getElementById("s5").style.display="none";						
			break;
            case 5:
			document.getElementById("s1").style.display="none";
			document.getElementById("s2").style.display="none";
			document.getElementById("s3").style.display="none";
			document.getElementById("s4").style.display="none";
			document.getElementById("s5").style.display="block";						
			break;					

	  }

  }
  
    function gotab2(n)
  {
	  switch(n){
            case 1:
			document.getElementById("s1a").style.display="block";
			document.getElementById("s2a").style.display="none";
			document.getElementById("s3a").style.display="none";
			document.getElementById("s4a").style.display="none";
				
			break;		  
		  
            case 2:
			document.getElementById("s1a").style.display="none";
			document.getElementById("s2a").style.display="block";
			document.getElementById("s3a").style.display="none";
			document.getElementById("s4a").style.display="none";
					
			break;
            case 3:
			document.getElementById("s1a").style.display="none";
			document.getElementById("s2a").style.display="none";
			document.getElementById("s3a").style.display="block";
			document.getElementById("s4a").style.display="none";
					
			break;
            case 4:
			document.getElementById("s1a").style.display="none";
			document.getElementById("s2a").style.display="none";
			document.getElementById("s3a").style.display="none";
			document.getElementById("s4a").style.display="block";
					
			break;			

	  }

  }