function displayDiv(tabno)
{
		var divnum;
		divnum=tabno;
		if(divnum==1)
		{
				document.getElementById("divhead1").style.backgroundColor="#DEDEDE";
				document.getElementById("divhead2").style.backgroundColor="#CCCCCC";
				document.getElementById("divhead3").style.backgroundColor="#CCCCCC";
				
				document.getElementById("thisvideo").style.display='block';
				document.getElementById("comment").style.display='none';
				document.getElementById("related").style.display='none';
		}
		else if(divnum==2)
		{
			document.getElementById("divhead1").style.backgroundColor="#CCCCCC";
			document.getElementById("divhead2").style.backgroundColor="#DEDEDE";
			document.getElementById("divhead3").style.backgroundColor="#CCCCCC";
			
			document.getElementById("thisvideo").style.display='none';
			document.getElementById("comment").style.display='block';
			document.getElementById("related").style.display='none';
		}
		else if(divnum==3)
		{
			document.getElementById("divhead1").style.backgroundColor="#CCCCCC";
			document.getElementById("divhead2").style.backgroundColor="#CCCCCC";
			document.getElementById("divhead3").style.backgroundColor="#DEDEDE";
			
			document.getElementById("thisvideo").style.display='none';
			document.getElementById("comment").style.display='none';
			document.getElementById("related").style.display='block';

		}
		
}