var ids=new Array('seite_0','seite_1','seite_2','seite_3','seite_4','seite_5','seite_6','seite_7','seite_8','seite_9','seite_10','seite_11','seite_12');

function switchid(id)
{	
	hideallids();
	showdiv(id);
}

function hideallids()
{
	//loop through the array and hide each element by id
	for (var i=0;i<ids.length;i++)
	{
		hidediv(ids[i]);
	}		  
}

function hidediv(id)
{
	//safe function to hide an element with a specified id
	if (document.getElementById) 
	{ // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'none';
	}
	else 
	{
		if (document.layers) 
		{ // Netscape 4
			document.id.display = 'none';
		}
		else 
		{ // IE 4
			document.all.id.style.display = 'none';
		}
	}
}

function showdiv(id)
{
	//safe function to show an element with a specified id
		  
	if (document.getElementById) 
	{ // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'block';
	}
	else 
	{
		if (document.layers) 
		{ // Netscape 4
			document.id.display = 'block';
		}
		else 
		{ // IE 4
			document.all.id.style.display = 'block';
		}
	}
}

function underline(element)
{
	document.getElementById('0').style.backgroundColor = '#FFFFFF';
	document.getElementById('1').style.backgroundColor = '#FFFFFF';
	document.getElementById('2').style.backgroundColor = '#FFFFFF';
	document.getElementById('3').style.backgroundColor = '#FFFFFF';
	document.getElementById('4').style.backgroundColor = '#FFFFFF';
	document.getElementById('5').style.backgroundColor = '#FFFFFF';
	document.getElementById('6').style.backgroundColor = '#FFFFFF';
	document.getElementById('7').style.backgroundColor = '#FFFFFF';
	document.getElementById('8').style.backgroundColor = '#FFFFFF';
	document.getElementById('9').style.backgroundColor = '#FFFFFF';
	document.getElementById('10').style.backgroundColor = '#FFFFFF';
	document.getElementById('11').style.backgroundColor = '#FFFFFF';
	document.getElementById('12').style.backgroundColor = '#FFFFFF';

	
	element.style.backgroundColor  = '#FFFFFF';
}