// JavaScript Document
function btn(index){
for(var i=1;i<=4;i++){
document.getElementById("rightnewslist"+i.toString()).style.display = 'none';
document.getElementById("btn"+i.toString()).className ='righttitleright1';
}
document.getElementById("rightnewslist"+index.toString()).style.display = 'block';
document.getElementById("btn"+index.toString()).className ='righttitleright2';
}