function ukryj(arg)
{

		
		document.getElementById("left_"+arg).style.background='url("images/left_normal.png") no-repeat center right';
		document.getElementById("right_"+arg).style.background='url("images/right_normal.png") no-repeat center left';
		document.getElementById("normal_bckg_"+arg).style.background='url("images/normal_bckg.png") repeat-x center left';
	
	
		if(document.getElementById(arg))
		document.getElementById(arg).style.display='none';
}
function podswietl(arg,wart)
{
	
	if(wart==1)
	{
		
		if(document.getElementById(arg))
		{
			document.getElementById("left_"+arg).style.background='url("images/left_active.png") no-repeat center right';
			document.getElementById("right_"+arg).style.background='url("images/right_active.png") no-repeat center left';
			document.getElementById("normal_bckg_"+arg).style.background='url("images/active_bckg.png") repeat-x center left';
		}
	}
	else if(wart==0)
	{
	if(document.getElementById(arg))
	{
		document.getElementById("left_"+arg).style.background='url("images/left_normal.png") no-repeat center right';
		document.getElementById("right_"+arg).style.background='url("images/right_normal.png") no-repeat center left';
		document.getElementById("normal_bckg_"+arg).style.background='url("images/normal_bckg.png") repeat-x center left';
	}	
	}
}