var arrayHtml = ["¢", "£", "¤", "¥", "¦", "§",
"¨", "©", "ª", "«", "®", "¯", "°", "±",
"²", "³", "´", "µ", "·", "¸", "¹", "º",
"»", "¼", "½", "¾", "¿", "À", "Á", "Â",
"Ã", "Ä", "Å", "Æ", "Ç", "È", "É", "Ê",
"Ë", "Ì", "Í", "Î", "Ï", "Ð", "Ñ", "Ò",
"Ó", "Ô", "Õ", "Ö", "×", "Ø", "Ù", "Ú",
"Û", "Ü", "Ý", "Þ", "ß", "à", "á", "â",
"ã", "ä", "å", "æ", "ç", "è", "é", "ê",
"ë", "ì", "í", "î", "ï", "ð", "ñ", "ò",
"ó", "ô", "õ", "ö", "÷", "ø", "ù", "ú",
"û", "ü", "ý", "þ", "ÿ", """, "&", "<",
">", "€", "ˆ", "˜", "…", "™"];

var arrayUtf  = ["¢", "£", "¤", "¥", "¦", "§",
"¨", "©", "ª", "«", "®", "¯", "°", "±",
"²", "³", "´", "µ", "·", "¸", "¹", "º",
"»", "¼", "½", "¾", "¿", "À", "Á", "Â",
"Ã", "Ä", "Å", "Æ", "Ç", "È", "É", "Ê",
"Ë", "Ì", "Í", "Î", "Ï", "Ð", "Ñ", "Ò",
"Ó", "Ô", "Õ", "Ö", "×", "Ø", "Ù", "Ú",
"Û", "Ü", "Ý", "Þ", "ß", "à", "á", "â",
"ã", "ä", "å", "æ", "ç", "è", "é", "ê",
"ë", "ì", "í", "î", "ï", "ð", "ñ", "ò",
"ó", "ô", "õ", "ö", "÷", "ø", "ù", "ú",
"û", "ü", "ý", "þ", "ÿ", "'", "&", "<",
">", "€", "ˆ", "˜", "…", "™"];

var datadbtblColumn = [
{unit:"Unit", symbol:"Symbol", def:"Definition", factor:"Factor to SI", res:"Result"},
{unit:"Unitá", symbol:"Simbolo", def:"Definizione", factor:"Fattore SI", res:"Risultato"}];

 var b4;

function html2utf(str){
  for (var i = 0; i < arrayHtml.length; i++) {
    str=str.replace(arrayHtml[i], arrayUtf[i]);
    //str=str.replace(/arrayHtml[i]/g, arrayUtf[i]);
  }
  return str;
}

function updateTable1(){
 // alert("strTbl00: ");
  var db = arraySelUnit;
  var chooseFrom = document.getElementById('unitFrom');
  var dbi = new Array();
  dbi = db[chooseFrom.selectedIndex].split('-unit-');
  var df = document.getElementById('dataFrom').value;
  var ff = chooseFrom.options[chooseFrom.selectedIndex].value;
  var tf = dbi[3];
  var res = 0;
  var il = 0;
  strTbl0 = "";
  if(lang == "it"){
    il = 1;
  }
  strTbl0 += '<tr class="tHead">';
  strTbl0 += '<td>'+datadbtblColumn[il].unit+'</td>';
  strTbl0 += '<td>'+datadbtblColumn[il].symbol+'</td>';
  strTbl0 += '<td>'+datadbtblColumn[il].def+'</td>';
  strTbl0 += '<td>'+datadbtblColumn[il].factor+'</td>';
  strTbl0 += '<td>'+datadbtblColumn[il].res+'</td>';
  strTbl0 += '</tr>';
  for (var i = 0; i < db.length; i++) {
    dbi = db[i].split('-unit-');
    tf = dbi[3];
    res = getResult(df, ff, tf);
    if( i%2 == 0 ){
      strTbl0 += '<tr class="tdE">';
    } else {
      strTbl0 += '<tr class="tdO">';
    }
    strTbl0 += '<td>'+dbi[0]+'</td>';
    strTbl0 += '<td>'+dbi[1]+'</td>';
    strTbl0 += '<td>'+dbi[2]+'</td>';
    strTbl0 += '<td>'+dbi[3]+'</td>';
    if(chooseFrom.selectedIndex == i){
      strTbl0 += '<td><input type="text" value="'+res+'" /></td>';
    } else {
      strTbl0 += '<td>'+res+'</td>';
    }
    strTbl0 += '</tr>';
  }
  alert("strTbl0: "+" db.length: "+db.length);
  return strTbl0;
}

function updateTable(tblId){
  var db = arraySelUnit;
  var chooseFrom = document.getElementById('unitFrom');
  var dbi = new Array();
  dbi = db[chooseFrom.selectedIndex].split('-unit-');
  var tbl = document.getElementById( tblId );
  var df = document.getElementById('dataFrom').value;
  var ff = chooseFrom.options[chooseFrom.selectedIndex].value;
  var tf = dbi[3];
  var row;
  var cel;
  var res = 0;
  var il = 0;
  if(tbl != null){
    var tbody = tbl.getElementsByTagName('tbody')[0];
    if(lang == "it"){
      il = 1;
    }
    // initialize the table delete rows
    while (tbody.rows.length > 0) {
      tbody.deleteRow(tbody.rows.length - 1);
    }
    //create head row
    row  = document.createElement("tr");
    createCell(row, datadbtblColumn[il].unit, "H");
    createCell(row, datadbtblColumn[il].symbol, "H");
    createCell(row, datadbtblColumn[il].def, "H");
    createCell(row, datadbtblColumn[il].factor, "H");
    createCell(row, datadbtblColumn[il].res, "H");
    row.className ="tHead";
    tbody.appendChild(row);
//alert(" updateTable: "+tblId+"-id:"+chooseFrom.selectedIndex+" factor:"+tf+"-db.l:"+db.length+"-unit:"+document.getElementById('selectUnit').value);
    //create rows
    for (var i = 0; i < db.length; i++) {
      dbi = db[i].split('-unit-');
      tf = dbi[3];
      res = getResult(df, ff, tf);
      row = document.createElement("tr");
//alert("updateT row id:"+i+"-df:"+df+"-ff:"+ff+"-tf:"+tf+"-db.l:"+db.length+"-u:"+dbi[0]+"-row:"+row);
      createCell(row, dbi[0]);
      createCell(row, dbi[1]);
      createCell(row, dbi[2]);
      createCell(row, dbi[3]);
      if(chooseFrom.selectedIndex == i){
        createCell(row, res, "I");
      } else {
        createCell(row, res);
      }
      tbody.appendChild(row);
      setRowStyle(row, -1);
    }
  }
}


function createCell(row, value, mode){
//alert("createCell: "+value+"row:"+row);
  value = html2utf(value);
  var cell = document.createElement("td");
  if(mode=="I"){
    var input = document.createElement('input');
    input.id = "inputFrom";
    input.type = "text";
    input.size = "9";
    input.maxlength = "10";
    input.className = "tdE";
    input.value = document.getElementById('dataFrom').value;
    input.onkeyup = function(){         // onkeyup onblur  onchange
      v = Number(input.value);
      if(v >= Number(999999)){
        v = v.toPrecision(6);
      }
      //document.getElementById('inputFrom').focus();
      //document.getElementById('inputFrom').select();
      //cell.focus();
      //cell.select();
      //input.focus();
      //input.select();
      document.getElementById('dataFrom').value = v;
 //     alert("input event");
    }
 /*   input.onfocus = function(){
      //document.getElementById('inputFrom').focus();
      //document.getElementById('inputFrom').select();
      this.focus();
      this.select();
           alert("input event....");
    } */
    cell.appendChild(input);
    if (input.attachEvent){
//       alert("input event333...."+input.attachEvent);
      input.attachEvent('onkeyup', setIt);
    } else {
      input.onchange = setIt;
    }

  } else {
    cell.appendChild(document.createTextNode(value));
  }
  row.appendChild(cell);
  if(mode == "H"){
    return;
  }
  cell.onclick = function(){
    selF = (row.rowIndex - 1);
    setUnitDP(selF);
  }
  cell.onmouseover = function(){
    rowM = (row.rowIndex - 1);
    setRowStyle(row, rowM);
  }
  cell.onmouseout  = function(){
    setRowStyle(row, selF);
  }
}

function setIt(){
  b4 = document.getElementById('dataFrom');
}

function getResult(df, ff, tf){
//alert("getResult1: "+"df:"+df+"ff:"+ff+"tf:"+tf);
//  var k = 1;
  if (ff.indexOf("[K]") >0 || tf.indexOf("[K]") >0){
    return getResultEq(df, ff, tf);
  }
//  var a = getEqu2Num(df, ff);
//  var b = getEqu2Num( k, tf);
//  var res = a / b;
  //var res = Number(df) * Number(ff) / Number(tf);
  var res = df * ff / tf;

  res = Number(res).toPrecision(6);
  return res;
}

function getResultEq(df, ff, tf){
  // convert to Kelvin
  df = Number(df);
  ff = html2utf(ff);
  tf = html2utf(tf);
//  df0=df;
  if (ff.indexOf("[°C]") >=0){
    df = df + 273.15;
  } else if (ff.indexOf("[°F]") >=0){
    df = (df + 459.67) * 5 / 9 ;
  } else if (ff.indexOf("[Ra]") >=0){
    df = df * 5 / 9;
  } else if (ff.indexOf("[°Ré]") >=0){
    df = (df * 5 / 4) + 273.15;
  } else if (ff.indexOf("[°Rø]") >=0){
    df = (df - 7.5) * 40 / 21 + 273.15;
  } else if (ff.indexOf("[°De]") >=0){
    df = 373.15 - df * 2 / 3;
  } else if (ff.indexOf("[°N]") >=0){
    df = df * 100 / 33 + 273.15;
  } else if (ff.indexOf("[K]") >=0){
    df = df;
  }
//  df1=df;

  if (df < 0){
    // Below absolute zero
    return "< absolute zero";
  }

 // convert Kelvin to unit
  if (tf.indexOf("[°C]") >=0){
    df = df - 273.15;
  } else if (tf.indexOf("[°F]") >=0){
    df = df * 9 / 5 - 459.67;
  } else if (tf.indexOf("[Ra]") >=0){
    df = df * 9 / 5;
  } else if (tf.indexOf("[Ré]") >=0){
    df = (df - 273.15) * 4 / 5;
  } else if (tf.indexOf("[°Rø]") >=0){
    df = (df - 273.15) * 21/40 + 7.5;
  } else if (tf.indexOf("[°De]") >=0){
    df = (df - 373.15) * 3 / 2;
  } else if (tf.indexOf("[°N]") >=0){
    df = df * 33 / 100 - 273.15;
  } else if (ff.indexOf("[K]") >=0){
    df = df;
  }

  // round it off
  if (Number.prototype.toFixed) {
    df = df.toFixed(7);
    df = parseFloat(df);
  } else {
    var leftSide = Math.floor(df);
    var rightSide = df - leftSide;
    df = leftSide + Math.round(rightSide * 10000000) / 10000000;
  }
  df = Number(df).toPrecision(6);
//alert("getResultEq: "+"df:"+df+"**df0:"+df0+"**df1:"+df1+"**ff:"+ff+"**tf:"+tf);
  return df;
}


function setUnitDP(idFrom) {
//alert("setUnitDP: "+idFrom);
  var db = arraySelUnit;
  var from = document.getElementById('dataFrom').value;
  var chooseTo   = document.getElementById('unitTo');
  var chooseFrom = document.getElementById('unitFrom');
  var unitTo     = chooseTo.value;
  var unitFrom   = chooseFrom.value;
  if(idFrom >=0 ){
    chooseFrom.selectedIndex = idFrom;
    chooseFrom.options[idFrom].selected=true;
    unitFrom = chooseFrom.options[idFrom].value;
    selF = idFrom;
  } else {
    selF = chooseFrom.selectedIndex;
  }
  var to = getResult(from, unitFrom, unitTo);
  var dbf = new Array();
  dbf = db[chooseFrom.selectedIndex].split('-unit-');
  var dbt = new Array();
  dbt = db[chooseTo.selectedIndex].split('-unit-');

  from = Number(from).toPrecision(6);
  document.getElementById('dataTo').value = to;

  var uf = dbf[0];
  var ut = dbt[0];
  if(dbf[1].length > 0){
    uf = " " + uf + " ["+dbf[1]+"] ";
  }
  if(dbt[1] != ""){
    ut = " " + ut + " ["+dbt[1]+"] ";
  }
  var res = from + html2utf(uf) + " = " + to + html2utf(ut);
  document.getElementById('unitResult').value = res;
  updateTable('tbl0');
  //updateTable1();
}


function setRowStyle(row, selM){
  var idrow = row.rowIndex - 1;
  var cell = row.getElementsByTagName("td");
  for (var i=0; i < cell.length; i++){
    if(idrow==selF){
      cell[i].className = "td0";
    } else if(idrow==selM){
      cell[i].className = "tdHL";
    } else if(i>=4){
      cell[i].className = "td4";
    } else if(cell[0].innerHTML.indexOf(si) >= 0){
      cell[i].className = "td1";
    } else if(idrow%2==0){
      cell[i].className = "tdE";
    } else {
      cell[i].className = "tdO";
    }
  }
}

function invertDP() {
  var unitFrom = document.getElementById('unitFrom').value;
  var unitTo = document.getElementById('unitTo').value;
  document.getElementById('unitFrom').value = unitTo;
  document.getElementById('unitTo').value = unitFrom;
  setUnitDP(-1);
}


function getEqu2Num(d, f){
//  var i0=0, t0="", v0=0, t="", str="", it=f.indexOf("[T]");
//  var res = 0;
/*  if(it >= 0){
    f = f.substring(0, it) + d + f.substring(it+3, f.length);
    for (var i = 0; i < f.length; i++) {
      t = f.substring(i, i+1);
      if (t=="+" || t=="-" || t=="*" || t=="/" || i == f.length-1){
        if(i == f.length-1){
          v0 = f.substring(i0, i+1);
        } else {
          v0 = f.substring(i0, i);
        }

        v0 = Number(v0);
        if(i0==0){
          res = v0;
        }
        if (t0=="+"){
          res = res + v0;
        } else if (t0=="-"){
          res = res - v0;
        } else if (t0=="*"){
          res = res * v0;
        } else if (t0=="/"){
          res = res / v0;
        }
        i0 = i+1;
        t0 = t;
        str += "::"+v0+":"+t0;
      }
    }
    //alert("getEqu2Num:"+f+"..."+str+"..."+v0+"...res:"+res);
  } else {   */
    res = d * f;
 // }
  res = Number(res).toPrecision(6);
  return res;
}