function link1(){
var navi = document.getElementById("link2");
var items = navi.getElementsByTagName("a");
for(var i=0; i < items.length; i++){
items[i].setAttribute("class","hidetxt");
}

var naviother = document.getElementById("link3");
var itemsother = naviother.getElementsByTagName("a");
for(var i=0; i < itemsother.length; i++){
itemsother[i].setAttribute("class","hidetxt");
}
}

function link2(){
var navi = document.getElementById("link2");
var items = navi.getElementsByTagName("a");
for(var i=0; i < items.length; i++){
items[i].setAttribute("class","hidetxt cr");
}

var naviother = document.getElementById("link3");
var itemsother = naviother.getElementsByTagName("a");
for(var i=0; i < itemsother.length; i++){
itemsother[i].setAttribute("class","hidetxt");
}
}

function link3(){
var navi = document.getElementById("link3");
var items = navi.getElementsByTagName("a");
for(var i=0; i < items.length; i++){
items[i].setAttribute("class","hidetxt cr");
}

var naviother = document.getElementById("link2");
var itemsother = naviother.getElementsByTagName("a");
for(var i=0; i < itemsother.length; i++){
itemsother[i].setAttribute("class","hidetxt");
}
}