function isTime(timeStr){
	timeCh = ':'
	var pos1=timeStr.indexOf(timeCh)
	
	var strHours=timeStr.substring(0,pos1)
	var strMinutes=timeStr.substring(pos1+1)
	//var strSeconds=timeStr.substring(pos2+1)
	
	if (strHours.charAt(0)=="0" && strHours.length>1) strHours=strHours.substring(1)
	if (strMinutes.charAt(0)=="0" && strMinutes.length>1) strMinutes=strMinutes.substring(1)
	
	
	hours=parseInt(strHours)
	minutes=parseInt(strMinutes)
	
	if (pos1==-1){
		return "Tids formatet skal være : hh:mm"
	}
	if (strHours.length<1 || hours<0 || hours>23){
		return "Indtast et gyldigt timetal "
	}
	if (strMinutes.length<1 || minutes<0 || minutes>59){
		return "Indtast et gyldigt minuttal"
	}
	
	if (timeStr.indexOf(timeCh,pos1+1)!=-1 || isInteger(stripCharsInBag(timeStr, timeCh))==false){
		return "Indtast et gyldigt tidspunkt"
	}
	
return true
}


function comparativeTime(timeStr) {
	
	timeCh = ':'
	var pos1=timeStr.indexOf(timeCh)
		
	var strHours=timeStr.substring(0,pos1)
	var strMinutes=timeStr.substring(pos1+1)
	
	if (strHours.length == 1) strHours = '0' + strHours;
	if (strMinutes.length == 1) strMinutes = '0' + strMinutes;
	
	return strHours + strMinutes;
	
}


/**
 * 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
}

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){
		return "Dato formatet skal være : dd-mm-yyyy"
	}
	if (strMonth.length<1 || month<1 || month>12){
		return "Indtast en gyldig måned"
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		return "Indtast en gyldig dag"
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		return "Indtast et gyldigt 4 cifret år mellem "+minYear+" og "+maxYear
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		return "Indtast en gyldig dato"
	}
	
return true
}

function comparativeDate(dtStr) {
	
	dtCh = '-'
	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)
	
	if (strMonth.length == 1) strMonth = '0' + strMonth;
	if (strDay.length == 1) strDay = '0' + strDay;
	
	return strYear + strMonth + strDay;
}