function isEmail(email)
{
	var regexp = /^[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*@[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*\.([A-Za-z]){2,4}$/i;
	var emailcheck = regexp.test(email);
	
	if(!emailcheck){
		return false
	}
	return true
}

function isInteger(s)
{
	var i;
    for (i = 0; i < s.length; i++)
	{   
		var c = s.charAt(i);
        if (((c < '0') || (c > '9'))) return false;
    }
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var 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) {
	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 dtCh = '-';
	var minYear = 1900;
	var maxYear = 2100;

	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('Ugyldig dato!')
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert('Indtast venligst en gyldig dag!')
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert('Indtast venligst en gyldig måned!')
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert('Indtast venligst et gyldigt år mellem '+minYear+' og '+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert('Indtast venligst en gyldig dato!')
		return false
	}
return true
}

function addLoadEvent(func)
{
    var oldonload = window.onload;
	
    if (typeof window.onload != 'function') {
        window.onload = func;
    } else {
        window.onload = function() {
            if (oldonload) {
                oldonload();
            }
            func();
        }
    }
}
		
function getPrintPage(){
  if(document.getElementById('strPrintContent') != null){
    var pageP = window.open('print.php','Udskriv','width=680, height=650, resizable=1')
  }else{
    alert("Der er ikke nogen printvenlig version til denne side")
  }
}

function rendermail(user, domain, classname, style, showname){
  var1=user;
  var2=domain;
  var3=var1+'@'+var2;
  emailE=(var3);
  if(showname!=""){
    document.write ('<a class="'+ classname +'" style="'+style+'" href="mailto:' + emailE + '">' + showname + '<\/a>');
  }else{
    document.write ('<a class="'+ classname +'" style="'+style+'" href="mailto:' + emailE + '">' + emailE + '<\/a>');
  }
}

function onEnter( evt, frm ) {
	var keyCode = null;

	if( evt.which ) {
		keyCode = evt.which;
	} else if( evt.keyCode ) {
		keyCode = evt.keyCode;
	}
	if( 13 == keyCode ) {
		frm.btnEnter.click();
		return false;
	}
	return true;
}

function makeRequest(url,type) {
    var httpRequest;
    if (window.XMLHttpRequest) {
        httpRequest = new XMLHttpRequest();
        if (httpRequest.overrideMimeType) {
            httpRequest.overrideMimeType('text/xml');
        }
    }
    else if (window.ActiveXObject) {
        try {
            httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
        } 
        catch (e) {
            try {
                httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
            } 
            catch (e) {}
        }
    }
    if (!httpRequest) {
        alert('Giving up :( Cannot create an XMLHTTP instance');
        return false;
    }

    httpRequest.onreadystatechange = function() { renderHtml(httpRequest,type); }
    
    httpRequest.open('GET', url, true);
    httpRequest.send('');
}

function renderHtml(httpRequest,id) {
    if (httpRequest.readyState == 4) {
        if (httpRequest.status == 200) {
            document.getElementById(id).innerHTML=httpRequest.responseText;
        } else {
            alert('There was a problem with the request.');
        }
    }
}