var czy;
function tlo(zmienna)
{
	
	document.getElementById('urzadzenia').style.backgroundPosition = "0px 0px";
	document.getElementById('galeria').style.backgroundPosition = "0px 0px";
	document.getElementById('gwarancja').style.backgroundPosition = "0px 0px";
	document.getElementById('kontakt').style.backgroundPosition = "0px 0px";
	document.getElementById('firma').style.backgroundPosition = "0px 0px";
	
	document.getElementById('urzadzenia').style.color = "#c1c1c1";
	document.getElementById('galeria').style.color = "#c1c1c1";
	document.getElementById('gwarancja').style.color = "#c1c1c1";
	document.getElementById('kontakt').style.color = "#c1c1c1";
	document.getElementById('firma').style.color = "#c1c1c1";
	
	document.getElementById(zmienna).style.backgroundPosition = "0px -153px"; 
	document.getElementById(zmienna).style.color = "#ff0000";
	czy=zmienna;

}

function tlo2(zmienna)
{
	
	document.getElementById(zmienna).style.backgroundPosition = "0px -153px"; 
	document.getElementById(zmienna).style.color = "#ff0000"; 

}

function tlo3(zmienna)
{
	if (zmienna!=czy)
	document.getElementById(zmienna).style.backgroundPosition = "0px 0px"; 
	document.getElementById(zmienna).style.color = "#c1c1c1";

}