var isNetscape4=document.layers;
var isNetscape6=document.getElementById && !document.all
//var DHTML=document.getElementById || document.all || document.layers;


function getStyle(nom) 
{
if (isNetscape6)
style=document.getElementByID(nom).style;
else if (isNetscape4)
style=document.layers [nom];
else
style=document.all[nom].style;
return(style);
}


function visible_mark00()  {getStyle('mark00').visibility=0 ? 'hidden':'visible';getStyle('mark01').visibility=1 ? 'hidden':'visible'; getStyle('mark02').visibility=1 ? 'hidden':'visible';getStyle('mark03').visibility=1 ? 'hidden':'visible'; getStyle('mark04').visibility=1 ? 'hidden':'visible';getStyle('mark05').visibility=1 ? 'hidden':'visible'; getStyle('mark_repeat').visibility=1 ? 'hidden':'visible';}
function visible_mark01()  {getStyle('mark00').visibility=1 ? 'hidden':'visible';getStyle('mark01').visibility=0 ? 'hidden':'visible'; getStyle('mark02').visibility=1 ? 'hidden':'visible';getStyle('mark03').visibility=1 ? 'hidden':'visible'; getStyle('mark04').visibility=1 ? 'hidden':'visible';getStyle('mark05').visibility=1 ? 'hidden':'visible'; getStyle('mark_repeat').visibility=1 ? 'hidden':'visible';}
function visible_mark02()  {getStyle('mark00').visibility=1 ? 'hidden':'visible';getStyle('mark01').visibility=1 ? 'hidden':'visible'; getStyle('mark02').visibility=0 ? 'hidden':'visible';getStyle('mark03').visibility=1 ? 'hidden':'visible'; getStyle('mark04').visibility=1 ? 'hidden':'visible';getStyle('mark05').visibility=1 ? 'hidden':'visible'; getStyle('mark_repeat').visibility=1 ? 'hidden':'visible';}
function visible_mark03()  {getStyle('mark00').visibility=1 ? 'hidden':'visible';getStyle('mark01').visibility=1 ? 'hidden':'visible'; getStyle('mark02').visibility=1 ? 'hidden':'visible';getStyle('mark03').visibility=0 ? 'hidden':'visible'; getStyle('mark04').visibility=1 ? 'hidden':'visible';getStyle('mark05').visibility=1 ? 'hidden':'visible'; getStyle('mark_repeat').visibility=1 ? 'hidden':'visible';}
function visible_mark04()  {getStyle('mark00').visibility=1 ? 'hidden':'visible';getStyle('mark01').visibility=1 ? 'hidden':'visible'; getStyle('mark02').visibility=1 ? 'hidden':'visible';getStyle('mark03').visibility=1 ? 'hidden':'visible'; getStyle('mark04').visibility=0 ? 'hidden':'visible';getStyle('mark05').visibility=1 ? 'hidden':'visible'; getStyle('mark_repeat').visibility=1 ? 'hidden':'visible';}
function visible_mark05()  {getStyle('mark00').visibility=1 ? 'hidden':'visible';getStyle('mark01').visibility=1 ? 'hidden':'visible'; getStyle('mark02').visibility=1 ? 'hidden':'visible';getStyle('mark03').visibility=1 ? 'hidden':'visible'; getStyle('mark04').visibility=1 ? 'hidden':'visible';getStyle('mark05').visibility=0 ? 'hidden':'visible'; getStyle('mark_repeat').visibility=1 ? 'hidden':'visible';}

function invisible_all_marks() {getStyle('mark00').visibility=1 ? 'hidden':'visible';getStyle('mark01').visibility=1 ? 'hidden':'visible'; getStyle('mark02').visibility=1 ? 'hidden':'visible';getStyle('mark03').visibility=1 ? 'hidden':'visible'; getStyle('mark04').visibility=1 ? 'hidden':'visible';getStyle('mark05').visibility=1 ? 'hidden':'visible'; getStyle('mark_repeat').visibility=1 ? 'hidden':'visible';}

function visible_mark_repeat()  {getStyle('mark_repeat').visibility=0 ? 'hidden':'visible';}

function visible_all_marks() {getStyle('mark00').visibility=0 ? 'hidden':'visible';getStyle('mark01').visibility=0 ? 'hidden':'visible'; getStyle('mark02').visibility=0 ? 'hidden':'visible';getStyle('mark03').visibility=0 ? 'hidden':'visible'; getStyle('mark04').visibility=0 ? 'hidden':'visible';getStyle('mark05').visibility=0 ? 'hidden':'visible'; getStyle('mark_repeat').visibility=0 ? 'hidden':'visible';}