function toggleHead(n){
    for(i=1; i<=3; i++)
    {       
        if(i==n){document.getElementById("lft"+i).style.display = "block";
		document.getElementById("lfta"+i).className = "hghead_act";
		}
        else{document.getElementById("lft"+i).style.display = "none";
		document.getElementById("lfta"+i).className = "";
		}
    }
}

function toggleHeadrt(n){
    for(i=1; i<=3; i++)
    {       
        if(i==n){document.getElementById("rt"+i).style.display = "block";
		document.getElementById("rta"+i).className = "hghead_acti";}
        else{document.getElementById("rt"+i).style.display = "none";
		document.getElementById("rta"+i).className = "";}
    }
}