// JavaScript Document
  var inputs = 1;
  function addWindow(){
    var table = document.getElementById('windows');

    var tr    = document.createElement('TR');
    var td1   = document.createElement('TD');
   var td2   = document.createElement('TD');
   var td3   = document.createElement('TD');
   var inp1  = document.createElement('INPUT');
    var inp2  = document.createElement('INPUT');
  
    if(inputs>0){
      var img     = document.createElement('IMG');
      img.setAttribute('src', 'fileadmin/templates/img/delete.gif');
      img.onclick = function(){
        removeContact(tr);
      }
     td1.appendChild(img);
    }

    inp1.setAttribute("Name", "tx_calculater_pi1[window_width][" +inputs+"]");
    inp2.setAttribute("Name", "tx_calculater_pi1[window_height]["+inputs+"]");
 
    table.appendChild(tr);
    tr.appendChild(td1);
    tr.appendChild(td2);
    tr.appendChild(td3);
    td2.appendChild(inp1);
    td3.appendChild(inp2);

    inputs++;
  }
  function removeContact(tr){
   tr.parentNode.removeChild(tr);

  }


   var inputs_d = 1;
  function addDoors(){
    var table = document.getElementById('doors');

    var tr    = document.createElement('TR');
    var td1   = document.createElement('TD');
   var td2   = document.createElement('TD');
   var td3   = document.createElement('TD');
   var inp1  = document.createElement('INPUT');
    var inp2  = document.createElement('INPUT');
  
    if(inputs>0){
      var img     = document.createElement('IMG');
      img.setAttribute('src', 'fileadmin/templates/img/delete.gif');
      img.onclick = function(){
        removeContact(tr);
      }
     td1.appendChild(img);
    }

    inp1.setAttribute("Name", "tx_calculater_pi1[door_width][" +inputs_d+"]");
    inp2.setAttribute("Name", "tx_calculater_pi1[door_height]["+inputs_d+"]");
 
    table.appendChild(tr);
    tr.appendChild(td1);
    tr.appendChild(td2);
    tr.appendChild(td3);
    td2.appendChild(inp1);
    td3.appendChild(inp2);

    inputs_d++;
  }