function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
  result = true;
  }
  return result;
}

function isValidPath(path)
{
  var result = false;
  var theStr = new String(path);
  var index1 = theStr.indexOf(":");
  var index2 = theStr.indexOf(unescape("%5C"));
  if ((index1 > 0) && (index2 > 0))
	  index = 1;
  if (index == 1)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
  result = true;
  }
  return result;
}

function validLength(formField,fieldLabel,nLength)
{
  var result = true;
  
  if (formField.value.length < nLength)
  {
    alert('Fältet "' + fieldLabel +'" måste innehålla minst "'+ nLength + '" tecken!');
    formField.select();
    result = false;
  }
  
  return result;
}

function validRequired(formField,fieldLabel)
{
  var result = true;
  
  if (formField.value == "")
  {
    alert('Fältet "' + fieldLabel +'" måste fyllas i!');
    formField.focus();
    result = false;
  }
  
  return result;
}

function validEmail(formField,fieldLabel,required)
{
  var result = true;
  
  if (required && !validRequired(formField,fieldLabel))
    result = false;

  if (required == true)
  {
	  if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	  {
		alert("Var god kontrollera att Epost-adressen är korrekt inskriven!");
		formField.select();
		result = false;
	  }
  }
   
  return result;

}

function validFile(formField,fieldLabel,required)
{
  var result = true;
  
  if (required && !validRequired(formField,fieldLabel))
    result = false;

  if (result && ((formField.value.length < 5) || !isValidPath(formField.value)) )
  {
    alert("Var god kontrollera att sökvägen till vald fil är korrekt inskriven!");
    //formField.focus();
	//alert(formField.value);
    result = false;
  }
   
  return result;

}

function validNum(formField,fieldLabel,required)
{
  var result = true;

  if (required && !validRequired(formField,fieldLabel))
    result = false;
  
   if (result)
   {
     var num = parseInt(formField.value,10);
     if (isNaN(num))
     {
       alert('Fältet "' + fieldLabel +'" måste innehålla ett nummer.');
      formField.focus();    
      result = false;
    }
  } 
  
  return result;
}

function validDate(formField,fieldLabel,required)
{
  var result = true;

  if (required && !validRequired(formField,fieldLabel))
    result = false;
  
   if (result)
   {
		 if (formField.value != "")
		 {
			 var elems = formField.value.split("-");     
			 result = (elems.length == 3); // should be three components     
			 if (result)
			 {
				 var year = parseInt(elems[0],10);
				 var month = parseInt(elems[1],10);
				 var day = parseInt(elems[2],10);
				 result = !isNaN(month) && (month > 0) && (month < 13) && !isNaN(day) && (day > 0) && (day < 32) && !isNaN(year) && (elems[0].length == 4);
			 }
			 if (!result)
			 {
				alert('Fältet "' + fieldLabel +'" måste innehålla ett datum i formatet [åååå-mm-dd] !');
				formField.select();    
			 }
		 }
  } 
  
  return result;
}

function validCompare(formField1,formField2,fieldLabel1,fieldLabel2)
{
	var result = true;

	if (!(formField1.value == formField2.value))
	{
		alert('Fälten "'+fieldLabel1+'" och "'+fieldLabel2+'" innehåller olika värden!\nDe måste innehålla samma värde!');
		formField1.value='';
		formField2.value='';
		formField1.focus();
		result = false;
	}

	return result;
}

function validSelection(formField,fieldLabel)
{
  var result = true;
  
  if (formField.options[0].selected)
  {
    alert('Välj ett värde i menyn "' + fieldLabel +'"!');
    formField.focus();
    result = false;
  }
  
  return result;
}