onclick of the INPUT TYPE submit field with the ID="convert" start a function that takes the content of the INPUT TYPE text field with the ID="yfullstrht" as a column containing in alternation the variable and a value. Take the input column and write the variables in row 1 and the values in row 2 into a DIV with the ID="ftdnastrht". Additionally print the result to a popup window.

document.getElementById("convert").onclick=function(){
  var val = document.getElementById('yfullstrht').value;
  var valarr = val.split(' ');
  var valarrlen = valarr.length;
  var valarrr=valarr.reverse();
  var res ="<table>";
  for (var i = 0; i < valarrlen; i+=2) {
    res = res + "<tr><td>" + valarrr[i-1] + "</td><td>" + valarrr[i] + "</td></tr>";
  }
  res = res +"</table>";
  document.getElementById("ftdnastrht").innerHTML=res;
  window.alert(res);
}