function showVid(n)
	{
	if (document.getElementById)          
		{
	     var v = document.getElementById('vid');
	     var x = document.getElementById('vid'+n);
	
		}
else if(document.all)  
		{
	     var v = document.all['vid'];
	     var x = document.all['vid'+n];
		}

      	v.innerHTML=x.innerHTML;
	   	var s=document.getElementById('sheet');
	if (n==0)         
		{
	    s.style.visibility="hidden";
		v.style.visibility="hidden";
		}
	else          
		{
	    s.style.visibility="visible";
	    v.style.visibility="visible";
		}
	}

function showCaption(n)
	{
	if (document.getElementById)  
		{
	    var a = document.getElementById('captions');
		}

  else if(document.all)  
		{
	    var a = document.all['captions'];
		}

 var b = document.getElementById('text'+n);
	a.innerHTML="";
	a.innerHTML=b.innerHTML;
	
	}