function hideCostas() {
	var style = document.getElementById('costas_main').style;
	style.display = 'none'; 
}

currentIndx=0;

Messages=new Array();

function prevCostasTip() {
  if (currentIndx>0){
    currentIndx=currentIndx-1;
  	document.getElementById('costas_papertext_paragraph').innerHTML = Messages[currentIndx];  	
  } /*else {
	currentIndx = (Messages.length - 1);
	document.getElementById('costas_papertext').innerHTML = Messages[currentIndx]; 
  }*/
}


function nextCostasTip() {
  if (currentIndx<Messages.length-1) {
    currentIndx=currentIndx+1;
	document.getElementById('costas_papertext_paragraph').innerHTML = Messages[currentIndx]; 
  } /*else {
	currentIndx=0;
	document.getElementById('costas_papertext').innerHTML = Messages[currentIndx];
  }*/
}