var lt='<';
var gt='>';

function uncollapse(id)
{
  e1=document.getElementById(id);
  e2=document.getElementById(id+'-2');
  if(e1 && e2)
  {
    e1.style.display='none';
    e2.style.display='block';
    return true;
  }
  return false;
}

		function cctoczk()
		{
		  var amount = document.getElementById('ccforeign').value;
		  var curr =  document.getElementById('ccforeigncurr').value;
		  curr = curr.split("|");
		  var currId = curr[0];
		  var currName = curr[1];
		  var currRate = parseFloat(curr[2]);
		  
		  amount = amount.replace(',','.');
		  amount = parseFloat(amount);
		  if(isNaN(amount))
		    result = errNaN;
		  else
		  {
		    amountNew = Math.round(1000 * currRate * amount) / 1000;
		    result = "<strong>" + amount+" "+currId+"</strong> ("+currName+") = <strong>"+amountNew+" CZK</strong> ";
		  }
		  document.getElementById('cc-result-to-czk').innerHTML=result;
		}
		
		function ccfromczk()
		{
		  var amount = document.getElementById('ccczk').value;
		  var curr =  document.getElementById('ccforeigncurr2').value;
		  curr = curr.split("|");
		  var currId = curr[0];
		  var currName = curr[1];
		  var currRate = parseFloat(curr[2]);
		  
		  amount = amount.replace(',','.');
		  amount = parseFloat(amount);
		  if(isNaN(amount))
		    result = errNaN;
		  else
		  {
		    amountNew = Math.round(1000 * amount / currRate) / 1000;
		    result = "<strong>" + amount+" CZK</strong> = <strong>"+amountNew+" "+currId+"</strong> ";
		  }
		  document.getElementById('cc-result-from-czk').innerHTML=result;
		}

function checksearch(f)
{
    if(f["F[arrival]"].value != "") {
        if(!isDate(f["F[arrival]"].value))
            return false;
    }
    if(f["F[departure]"].value != "") {
        if(!isDate(f["F[departure]"].value))
            return false;
    }
    return true;
}		

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
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	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("The date format should be : dd/mm/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}