function validera()
{
   var returnValue = true;

   var txtElement =  document.getElementById("txtMail");
   if(txtElement.value == "")
   {
        txtElement.focus();
        txtElement.select();
        var spanElement = document.getElementById("spTxtMail");
        spanElement.style.visibility = 'visible';
        spanElement.style.display = 'inline';
        returnValue = false;
   }
   else
   {
        var spanElement = document.getElementById("spTxtMail");
        spanElement.style.visibility = 'hidden';
        spanElement.style.display = 'none';
   }

   var txtElement =  document.getElementById("txtAdresse");
   if(txtElement.value == "")
   {
        txtElement.focus();
        txtElement.select();
        var spanElement = document.getElementById("spTxtAdresse");
        spanElement.style.visibility = 'visible';
        spanElement.style.display = 'inline';
        returnValue = false;
   }
   else
   {
        var spanElement = document.getElementById("spTxtAdresse");
        spanElement.style.visibility = 'hidden';
        spanElement.style.display = 'none';
   }
      
   var txtElement =  document.getElementById("txtEtternavn");
   if(txtElement.value == "")
   {
        txtElement.focus();
        txtElement.select();
        var spanElement = document.getElementById("spTxtEtternavn");
        spanElement.style.visibility = 'visible';
        spanElement.style.display = 'inline';
        returnValue = false;
   }
   else
   {
        var spanElement = document.getElementById("spTxtEtternavn");
        spanElement.style.visibility = 'hidden';
        spanElement.style.display = 'none';
   }
   
   
   var txtElement =  document.getElementById("txtFornavn");
   if(txtElement.value == "")
   {
        txtElement.focus();
        txtElement.select();
        var spanElement = document.getElementById("spTxtFornavn");
        spanElement.style.visibility = 'visible';
        spanElement.style.display = 'inline';
        returnValue = false;
   }
    else
   {
        var spanElement = document.getElementById("spTxtFornavn");
        spanElement.style.visibility = 'hidden';
        spanElement.style.display = 'none';
   }
   
   var txtElement =  document.getElementById("txtTelefon");
   var txtElement2 =  document.getElementById("txtMobil");
   if(txtElement.value == "" && txtElement2.value == "")
   {
        var spanElement = document.getElementById("spTxttelefon");
        spanElement.style.visibility = 'visible';
        spanElement.style.display = 'inline';
        var spanElement2 = document.getElementById("spTxtMobil");
        spanElement2.style.visibility = 'visible';
        spanElement2.style.display = 'inline';
        returnValue = false;
   }
    else
   {
        var spanElement = document.getElementById("spTxttelefon");
        spanElement.style.visibility = 'hidden';
        spanElement.style.display = 'none';
        var spanElement = document.getElementById("spTxtMobil");
        spanElement.style.visibility = 'hidden';
        spanElement.style.display = 'none';
   }
   
   
   
   return returnValue;
}

function historyGo(step)
{
    history.go(step);
}