function partsCalc()
{
  var finalValue = 20;
  var fields = new Array();

  fields[0] = new Object();
  fields[0]["ID"] = "countDVD-ROM";
  fields[0]["price"] = 50;

  for(i=0; i< fields.length; i++)
  {
    if(document.getElementById(fields[i]["ID"]).value >= 1)
      finalValue += (document.getElementById(fields[i]["ID"]).value * fields[i]["price"]);
    else
      document.getElementById(fields[i]["ID"]).value = 0;
  }
  
  document.getElementById('inputCountAll').value = finalValue;
}

function refreshPreviewPicture()
{
  if(document.getElementById('Image').value != "")
  {
    document.getElementById('imagePreview').src = "images/upload/"+ document.getElementById('Image').value;
    document.getElementById('imagePreview').width = document.getElementById('ImageWidth').value;
    document.getElementById('imagePreview').height = document.getElementById('ImageHeight').value;
    document.getElementById('imagePreview').style.visibility="visible";
  }
  else
  {
    document.getElementById('imagePreview').style.visibility="hidden";
    document.getElementById('imagePreview').width = 1;
    document.getElementById('imagePreview').height = 1;
  }
}