var current=-1;
function openIt(x) {
closeIt();
current=x;
if(isNC4) 
{
   showbox= document.layers[x]
   showbox.visibility = "show";
}

else
	{
	el=document.getElementById("box"+x);
	if(el!=null)
	el.style.visibility="visible";
    } 
}

function closeIt() {
if(isNC4 && current>-1)
	{
	 document.layers[current].visibility = "hide"
	}
else
	   {
	   		elClose=document.getElementById("box"+current);
	   		if(elClose!=null)
			elClose.style.visibility = "hidden";	   		
	   }          

}