var def_convert="1.0"   // Version of convert.js
var tabLen,tabArea,tabWt,tabVol = true;

var errorStrings=new Array();

errorStrings['converr'] =new Array( comm_msg002,convert_msg001 );
errorStrings['numerr'] =new Array( comm_msg003,comm_msg039 +comm_msg041 + comm_msg042 );
errorStrings['inpterr'] =new Array( comm_msg004,comm_msg039 + comm_msg041 );

var valueLength = new Array(
"1",
"2.54",
"0.39",
"25.40",
"0.04",
"0.31",
"3.28",
"0.91",
"1.09",
"1.61",
"0.62");

var valueArea = new Array(
"1",
"6.451",
"0.15",
"0.09",
"10.76",
"0.84",
"1.20",
"2.59",
"0.39",
"0.40",
"2.47");

var valueVolume = new Array(
"1",
"16.39",
"0.06",
"0.03",
"35.32",
"0.76",
"1.31",
"0.02",
"61.03",
"4.55",
"0.22",
"3.79",
"0.26",
"30.77",
"0.03");

var valueWeight = new Array(
"1",
"28.35",
"0.04",
"0.45",
"2.21",
"1.02",
"0.98",
"0.91",
"1.10");

selectsArray = new Array(
"lengthSelects",
"areaSelects",
"volumeSelects",
"weightSelects");

function makeSelects( )
{
    var index = 0;
    //For length combobox
    for( j=0 ; j< optionsLength.length ;j++ )
    {

        document.lengthForm.lengthSelects.options[j]=new Option( optionsLength[j] );
        document.lengthForm.lengthSelects.options[j].value =valueLength[j];

    }
    document.lengthForm.lengthSelects.selectedIndex = index;


    for( j=0 ; j< optionsArea.length ;j++ )
    {
        document.areaForm.areaSelects.options[j]=new Option( optionsArea[j] );
        document.areaForm.areaSelects.options[j].value =valueArea[j];
    }
   document.areaForm.areaSelects.selectedIndex = index;


    for( j=0 ; j< optionsVolume.length ;j++ )
    {
        document.volumeForm.volumeSelects.options[j]=new Option( optionsVolume[j] );
        document.volumeForm.volumeSelects.options[j].value =valueVolume[j];
    }
  document.volumeForm.volumeSelects.selectedIndex = index;

    for( j=0 ; j< optionsWeight.length ;j++ )
    {
        document.weightForm.weightSelects.options[j]=new Option( optionsWeight[j] );
        document.weightForm.weightSelects.options[j].value =valueWeight[j];
    }
  document.weightForm.weightSelects.selectedIndex = index;

}

function convertAlert( stringId )
{
  eName   = errorStrings[stringId][0];
  eText   = errorStrings[stringId][1];
  eWidth  = errorStrings[stringId][2];
  eHeight = errorStrings[stringId][3];

  if( typeof( def_dhlAlert ) != "undefined" )
  {
    dhlAlert( eName, eText, eWidth, eHeight )
  }
  else
  {
    alert( eName+"\n"+eText );
  }
}

function twoDps( item )
{
  return ( parseInt( item * 100 ) / 100 );
}

function convertFunc( formname, num_to_change, mult )
{
  with( document.forms[formname] )
  {
    var num_change = num_to_change.value;
    var mult_by  = mult.options[mult.selectedIndex].value;

    if( mult_by == "" )
    {
      convertAlert( "converr" )
    }
    else
    {
      if( num_change < 0 )
      {
        result.value = "0";
        num_to_change.value = "0";
        convertAlert( "numerr" );
        return ;
      }
      else
      {
        var nresult = twoDps(num_change * mult_by);
        result.value = nresult;
      }
    }

    if( isNaN( nresult ) )
    {
      result.value = "0";
      num_to_change.value = "0";
      convertAlert( "inpterr" )
    }
  }
}
function fnSetTabLen()
{
  if(tabLen)
  {
    document.areaForm.num_to_change.focus();
  }
  else
  {
    document.lengthForm.lengthSelects.focus();
  }
}
function fnSetTabArea()
{
  if(tabArea)
  {
    document.volumeForm.num_to_change.focus();
  }
  else
  {
    document.areaForm.areaSelects.focus();
  }
}
function fnSetTabVol()
{
  if(tabWt)
  {
    document.weightForm.num_to_change.focus();
  }
  else
  {
    document.volumeForm.volumeSelects.focus();
  }
}