// Login functions

function HighliteButton(FRM,BTN)
{
  window.document.forms[FRM].elements[BTN].style.backgroundColor = "#CC0033";
  window.document.forms[FRM].elements[BTN].style.borderStyle = "outset";
}

function DimButton(FRM,BTN)
{
  window.document.forms[FRM].elements[BTN].style.backgroundColor = "#790a0a";
  window.document.forms[FRM].elements[BTN].style.borderStyle = "solid";
}

function Login(FRM, username, password)
{
  if ((username == "") || (password == ""))
  {
    alert("Användarnamn eller lösenord saknas.");
    return false;
  }
  else
  {
    FRM.submit();
    return true;
  }
}

function Logout(FRM)
{
  if (confirm("Är du säker på att du vill logga ut?"))
  {
    FRM.submit();
  }
}


// Expand or collaps parts of the page
function expandCollapse() 
{
	for (var i=0; i<expandCollapse.arguments.length; i++) 
	{
		var element = document.getElementById(expandCollapse.arguments[i]);
		element.style.display = (element.style.display == "none") ? "block" : "none";
	}
}


// Used to sort a list depending on what column is clicked
function SortListByColumn(newSortColumn, sortForm, userAction)
{
  // NOTE: The form sent in MUST have the form variables "SortBy" and "UserAction" defined (as hidden)!

  var oldSortColumn = sortForm.SortBy.value;
  if (oldSortColumn == newSortColumn)
  {
    sortForm.SortBy.value = newSortColumn + " DESC";
  }
  else
  {
    sortForm.SortBy.value = newSortColumn;
  }
  sortForm.UserAction.value = userAction;
  sortForm.submit();
}  




// String functions

function TrimSpaces(strText)
{ 
  // This will get rid of leading spaces 
  while (strText.substring(0,1) == ' ') 
    strText = strText.substring(1, strText.length);

  // This will get rid of trailing spaces 
  while (strText.substring(strText.length-1,strText.length) == ' ')
    strText = strText.substring(0, strText.length-1);

  return strText;
} 

function EndsWith(strText, suffix)
{ 
  return strText.indexOf(suffix, strText.length - suffix.length) !== -1; 
} 



//==================================================================================================
/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year

var dtCh= "-";
var minYear=1900;
var maxYear=2100;

function isInteger(s)
{
  var i;
  for (i = 0; i < s.length; i++)
  {   
    // Check that current character is number.
    var c = s.charAt(i);
    if (((c < "0") || (c > "9")))
      return false;
  }
  // All characters are numbers.
  return true;
}

function stripCharsInBag(s, bag)
{
    var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1)
          returnString += c;
    }
    return returnString;
}

function daysInFebruary (year)
{
    // February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n)
{
    for (var i = 1; i <= n; i++)
    {
        this[i] = 31
        if (i==4 || i==6 || i==9 || i==11)
            {this[i] = 30}
       if (i==2)
        {this[i] = 29}
   } 
   return this
}

// Check if valid date of form YYYY-MM-DD
function isDate(dtStr)
{
  var daysInMonth = DaysArray(12)
  var pos1=dtStr.indexOf(dtCh)
  var pos2=dtStr.indexOf(dtCh,pos1+1)

  var strYear=dtStr.substring(0,pos1)
  var strMonth=dtStr.substring(pos1+1,pos2)
  var strDay=dtStr.substring(pos2+1)
  //alert(" strYear=" + strYear + "\n strMonth="+strMonth+"\n strDay="+strDay);

  strYr=strYear
  if (strDay.charAt(0)=="0" && strDay.length>1)
    strDay=strDay.substring(1)
  if (strMonth.charAt(0)=="0" && strMonth.length>1)
    strMonth=strMonth.substring(1)
  for (var i = 1; i <= 3; i++)
  {
    if (strYr.charAt(0)=="0" && strYr.length>1)
      strYr=strYr.substring(1)
  }
  month=parseInt(strMonth)
  day=parseInt(strDay)
  year=parseInt(strYr)
  if (pos1==-1 || pos2==-1)
  {
    alert("Datumet skall anges i formen: ÅÅÅÅ-MM-DD")
    return false
  }
  if (strMonth.length<1 || month<1 || month>12)
  {
    alert("Vänligen mata in en giltig månad (1-12).")
    return false
  }
  if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month])
  {
    alert("Vänligen mata in en giltig dag.")
    return false
  }
  if (strYear.length != 4 || year==0 || year<minYear || year>maxYear)
  {
    alert("Vänligen mata in ett giltigt år.")// mellan "+minYear+" och "+maxYear+".")
    return false
  }
  if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false)
  {
    alert("Vänligen mata in ett giltig datum.")
    return false
  }
  return true
}