//
//  Sposta il focus sul campo specificato
//
function setFocusField(name)
{
  if (document.forms.length <= 0)
    return;

  for (i = 0; i < document.forms.length; i++)
  {
    for (j = 0; j < document.forms[i].elements.length; j++)
    {
      var field = document.forms[i].elements[j];

      if ((field.name == name) && (!field.disabled))
      {
        field.focus();
        if ((field.type == "text") || (field.type == "textarea") ||
          (field.type == "password"))
          field.select();
        break;
      }
    }
  }
  return;
}

//
//  Se il campo specificato è stato compilato invia la form, altrimenti non
//  invia la form, mostra il messaggio di avvertimento indicato, e sposta il
//  focus sul campo
//
function checkEmptyField(form, field, message)
{
  if (field.value == "")
  {
    setFocusField(field.name)
    alert(message);
    return false;
  }
  else
  {
    form.submit();
    return true;
  }
}

function clear(id)
{
  document.getElementById(""+ id +"").value="";
}

function cambiaStile1(id)
{
  document.getElementById("link1").style.background= "none";
  document.getElementById("link1").style.color="#a49992";
  document.getElementById("link2").style.background= "none";
  document.getElementById("link2").style.color="#a49992";
  document.getElementById("link3").style.background= "none";
  document.getElementById("link3").style.color="#a49992";
  document.getElementById("link4").style.background= "none";
  document.getElementById("link4").style.color="#a49992";
  document.getElementById("link5").style.background= "none";
  document.getElementById("link5").style.color="#a49992";
  document.getElementById("link6").style.background= "none";
  document.getElementById("link6").style.color="#a49992";

  if(id == 'link1')
  {
    document.getElementById(""+ id +"").style.background="url(im/li2-hover-big.gif) no-repeat";
    document.getElementById(""+ id +"").style.color="#FFF";
  }
  else
  {
    document.getElementById(""+ id +"").style.background="url(im/li2-hover.gif) no-repeat";
    document.getElementById(""+ id +"").style.color="#FFF";
  }
}

function cambiaStile2(id)
{
  document.getElementById("link1").style.background= "none";
  document.getElementById("link2").style.background= "none";
  document.getElementById("link3").style.background= "none";
  document.getElementById("link4").style.background= "none";
  document.getElementById("link5").style.background= "none";
  document.getElementById("link6").style.background= "none";

  if(id == 'link1')
    document.getElementById(""+ id +"").style.background="url(im/li2-hover-big.gif) no-repeat";
  else
    document.getElementById(""+ id +"").style.background="url(im/li2-hover.gif) no-repeat";

  document.getElementById(""+ id +"").style.color="#FFF";
}

function getHeight()
{
  height =document.getElementById('w').offsetHeight;
  alert(height);
}