function centraliza()
{
	var x,y;	
	var resX, resY;
	
	resX = screen.width;
	
	resY = screen.height;
	
	var homeholder	= document.getElementById('idiomas');
	var logoholder	= document.getElementById('logo');
	var tarja		= document.getElementById('tarja');
	

	if (self.innerHeight){x = self.innerWidth;y = self.innerHeight;}
	else if (document.documentElement && document.documentElement.clientHeight){x = document.documentElement.clientWidth;y = document.documentElement.clientHeight;}
	else if (document.body){x = document.body.clientWidth;	y =document.body.clientHeight;}
	var measures	= StyleInfo.getMeasures(homeholder);
	
	if(measures.height < resY)
	{
		var position 		= Math.round((y - measures.height) / 2);
		if(position < 0)position = 0;
		homeholder.style.top	= position + 'px';
	}
	else homeholder.style.top	= '0px';


	var measures	= StyleInfo.getMeasures(logoholder);
	
	if(measures.height < resY)
	{
		var position 		= Math.round((y - measures.height) / 2);
		if(position < 0)position = 0;
		logoholder.style.top	= (position + 40) + 'px';
	}
	else logoholder.style.top	= '0px';
	
	tarja.style.height	= y + 'px';
	
}