a=new Array('info','reviews');
b=new Array('infobtn','reviewbtn');

function show(pos){
  for(var i=0;i<a.length;i++){
    hide(a[i],b[i]);
  }
  var t=a[pos];
  var bb=b[pos];
  if(document.getElementById){
    var obj=document.getElementById(t);
    obj.style.visibility="visible";
    var obj=document.getElementById(bb);
    obj.style.backgroundImage="url(../../images/"+bb+"_on.gif)";
  }

}

function hide(t,bb){
  if(document.getElementById){
    var obj=document.getElementById(t);
    obj.style.visibility="hidden";
    var obj=document.getElementById(bb);
    obj.style.backgroundImage="url(../../images/"+bb+".gif)";
  }
}