var eOld = null;
var eSrc = null;

function tabsetcolor(t,c)
{
	document.getElementById("ltab" + t).className=c;
	document.getElementById("mtab" + t).className=c;
	document.getElementById("rtab" + t).className=c;
}

function setTab(eSrc) 
{
	for (u=1; u<=7; u++)
	{
		if(eSrc != u)
		{ 
			eTxt2="txttab"+u;
			tabsetcolor(u,'tab-button');
			document.getElementById(eTxt2).style.display='none';
		}
		else
		{
			if(eSrc != eOld)
			{ 
				if(eOld != null)
				{ 
					eTxt2="txttab"+eOld;
					tabsetcolor(eOld,'tab-button');
					document.getElementById(eTxt2).style.display='none';
				}

				eTxt="txttab"+eSrc;
				eOld=eSrc;
				tabsetcolor(eSrc,'tab-button-on');
				document.getElementById(eTxt).style.display='block';
				document.getElementById('tab').value=eSrc;
			}
		}
	}
}