var old;
function show(i,max){
	for(var l = 0;l<=max;l++){
		if(l == i){
			visi('main'+l,1);
			document.getElementById('main'+l).style.display = 'block';
		}
		else{
			visi('main'+l,0);	
			document.getElementById('main'+l).style.display = 'none';	
		}
	}
}
function visi(nr,visibility)
{
	 if (document.layers)
	 {
		 vista = (visibility) ? 'show' : 'hide'
		 document.layers[nr].visibility = vista;
	 }
	 else if (document.all)
	 {
		 vista = (visibility) ? 'visible' : 'hidden';
		 document.all[nr].style.visibility = vista;
	 }
	 else if (document.getElementById)
	 {
		 vista = (visibility) ? 'visible' : 'hidden';
		 document.getElementById(nr).style.visibility = vista;
	
	 }
}