var help = 0;

function displayhelp() {
  if (help == 0) {
    document.getElementById("help").style.display = "block";
    document.getElementById("help_button").innerHTML = "Hide Help";
    help = 1;
  } else {
    document.getElementById("help").style.display = "none";
    document.getElementById("help_button").innerHTML = "Display Help";
    help = 0;
  }
}

function addsearchtext() {
  var textdiv = document.getElementById("searchtext");

  var newdiv = document.createElement("div");
  newdiv.setAttribute("class","searchtext");

  var newnode = document.createElement("label");
  newnode.setAttribute("for","searchtext");
  var newtextnode = document.createTextNode("Text to search:");
  newnode.appendChild(newtextnode);

  newdiv.appendChild(newnode);

  newnode = document.createElement("textarea");
  newnode.name="searchtext[]";
  newnode.setAttribute("rows","6");
  newnode.setAttribute("cols","40");

  newdiv.appendChild(newnode);

  textdiv.appendChild(newdiv);

  if(textdiv.childNodes.length > 1) {document.getElementById("remove_button").style.display = "block";}
  else {document.getElementById("remove_button").style.display = "none";}
}

function removesearchtext() {
  var textdiv = document.getElementById("searchtext");
  if(textdiv.childNodes.length > 1) {
    textdiv.removeChild(textdiv.lastChild);
  }
  if(textdiv.childNodes.length > 1) {document.getElementById("remove_button").style.display = "block";}
  else {document.getElementById("remove_button").style.display = "none";}
}