var isIE = false;
var IEversion = 0;

{
    var ua = navigator.userAgent.toLowerCase(); 
    isIE = ( (ua.indexOf('msie') != -1) && (ua.indexOf('opera') == -1) && (ua.indexOf('webtv') == -1) ); // browser name
    IEversion = parseFloat(navigator.appVersion); // browser version
    if (isIE && IEversion >= 4) {
        IEversion = parseFloat( ua.substring( ua.indexOf('msie ') + 5 ) ); // correct version number
    }   
}

function isBirthYear(_year) {
	if (_year.search(/^[1-2]{1}[0-9]{3}$/gi)!=-1) {
        var numer = parseInt(_year);
        var today = new Date();
        if (numer<1800|| numer>today.getFullYear()) {
            return false;
        }
		return true;
	}
	return false;
}

function isEmailValid(emailstring) {
	if (!emailstring.match(/^[a-z0-9+]{1}[a-z_0-9-\.]*@[a-z0-9]{1}[a-z0-9-]*(\.[a-z0-9]{1}[a-z0-9-]*)+$/gi)) {
		return false;
	}
	return true;
}

function getPageSize(){
		
			var xScroll, yScroll;
			
			if (window.innerHeight && window.scrollMaxY) {	
				xScroll = document.body.scrollWidth;
				yScroll = window.innerHeight + window.scrollMaxY;
			} else if (document.body.scrollHeight > document.body.offsetHeight){
				xScroll = document.body.scrollWidth;
				yScroll = document.body.scrollHeight;
			} else {
				xScroll = document.body.offsetWidth;
				yScroll = document.body.offsetHeight;
			}
			
			var windowWidth, windowHeight;
			if (self.innerHeight) {
				windowWidth = self.innerWidth;
				windowHeight = self.innerHeight;
			} else if (document.documentElement && document.documentElement.clientHeight) {
				windowWidth = document.documentElement.clientWidth;
				windowHeight = document.documentElement.clientHeight;
			} else if (document.body) {
				windowWidth = document.body.clientWidth;
				windowHeight = document.body.clientHeight;
			}	
			
			if(yScroll < windowHeight){
				pageHeight = windowHeight;
			} else { 
				pageHeight = yScroll;
			}
		
			if(xScroll < windowWidth){	
				pageWidth = windowWidth;
			} else {
				pageWidth = xScroll;
			}
		
		
			arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
			return arrayPageSize;
		}

function confirmBox(htmlstring,width,height,type) {
  if (width<300)
    width = 300;
  if (height < 170)
    height = 170;
	var pageSize = new Array();
	pageSize = getPageSize();
  var parameters = [htmlstring,type];
  var rv = window.showModalDialog('tak_nie.php',parameters,'dialogHeight: '+height+'px;dialogWidth: '+width+'px;center: yes;help: no;resizable: no;scroll: no;status: no; dialogTop:'+((pageSize[3] - height)/ 2)+'px; dialogLeft:'+((pageSize[2] - width)/ 2)+'px;');
  if (rv == 1)
    return true;
  return false;
}

function openInWindow(_url,_width, _height) {
    if (_width<1) { _width = 300; }
    if (_height<1) { _height = 300; }
    window.open(_url,'','status=no,width='+(_width+20)+',height='+(_height+20)+',screenX=50,screenY=50,left=50,top=50');
}

function openInWindow2(_url,_width, _height) {
    if (_width<1) { _width = 300; }
    if (_height<1) { _height = 300; }
    window.open(_url,'','status=no,width='+(_width+20)+',height='+(_height+20)+',screenX=50,screenY=50,left=50,top=50,resizable=1,scrollbars=auto');
}

function urlencode(s) {
    var hexDigit = '0123456789ABCDEF';
    var ns = '';
    var z = '';
    s = String(s);
    for(i=0;i<s.length;i++) {
        z = charASCIIcode(s.charAt(i));
        if ((z>=97 && z<=122) || (z>=65 && z <= 90) || (z>=48 && z <= 57)) {
            ns += s.charAt(i);
        } else {
            ns += '%'+hexDigit.charAt((z&0xF0)>>>4)+hexDigit.charAt(z&0x0F);
        }
    }
    return ns;
}

function isCorrectBrowser(_version) {
    return true;
    /**
    if (browser.isIE && browser.versionMinor>=_version)))
        return true
    else
        return false;
    **/
}

// 0x09-0x0D, 0x20
function isspace(s) {
    return ((s>='\t'&&s<='\r')||s==' ')?true:false;
}

function isalpha(s) {
    return ((s>='a'&&s<='z')||(s>='A'&&s<='Z'))?true:false;
}
function uclcwords2(s) {
    s = String(s);
	//s = s.charAt(0).toUpperCase() + ;
	s = s.replace(/^(.{0})(.)/g, function ( mama ) { return mama.toUpperCase ( ); } );
	return s.replace(/(\s|\-)(.)/g, function ( mama ) { return mama.toUpperCase ( ); } );
	/*
	arrrrrrr = s.split("-");
	wrd = '';
	for(i=0; i<arrrrrrr.length; i++){
		fklajkofjaeiohgae = String(arrrrrrr[i]);
		fklajkofjaeiohgae = fklajkofjaeiohgae.toUpperCase();
		if(i > 0){
			wrd += '-' + (arrrrrrr[i]);
		}else{
			wrd += (arrrrrrr[i]);
		}
	}
	alert(wrd);
	//uclcwords(s);
	//return wrd;
	*/
}
function uclcwords(s) {
    s = String(s);
    var ns = '';
    var wspc = true;
    var walpha = false;
    if (s.length==0) { return s; }
    for(i=0;i<s.length;i++) {
        if (isalpha(s.charAt(i))) {
            if (wspc) {
                ns += String(s.charAt(i)).toUpperCase(); wspc = false; walpha = true;
                continue;
            } else if (walpha) {
                ns += String(s.charAt(i)).toLowerCase();
                continue;
            }
            walpha = true;
        } else if (isspace(s.charAt(i))) {
            wspc = true; walpha = false;
        } else {
            wspc = false;
        }
        ns += s.charAt(i);
    }
    return ns;
}
function ucwords(s) {
    s = String(s);
    var ns = '';
    var wspc = true;
    if (s.length==0) { return s; }
    for(i=0;i<s.length;i++) {
        if (isalpha(s.charAt(i)) && wspc) {
            ns += String(s.charAt(i)).toUpperCase(); wspc = false;
            continue;
        } else if (isspace(s.charAt(i))) {
            wspc = true;
        } else {
            wspc = false;
        }
        ns += s.charAt(i);
    }
    return ns;
}

function doLogout() {
    if (confirmBox('Czy na pewno chcesz się wylogować ?',0,0,2)) {
        location.href = 'logout.php';
    }
}

function cmpDates(y1,m1,d1,y2,m2,d2) {
    // d1 > d2   1
    // d1 == d2  0
    // d1 < d2  -1
    if (y1==y2 && m1==m2 && d1==d2) { return 0; }
    if (y1>y2 || (y1==y2 && m1>m2) || (y1==y2 && m1==m2 && d1>d2)) {
        return 1;
    }
    return -1;
}

function isDateCorrect(y1,m1,d1) {
    if (y1<2003 || m1>12 || m1<1 || d1>31 || d1<1) { return false; }
    return true;
}

var wh_pon = null;
function autorPonaglenie(abstrakt_id) {
    if (wh_pon != null) { wh_pon.close(); }
    wh_pon = window.open('mail_druk.php?druk=PONAGLENIE_AUTOR&abstrakt_id='+abstrakt_id,'wh_pon','status=no,width=620,height=500,screenX=50,screenY=50,left=50,top=50,scrollbars=1');
    wh_pon.focus();
}

function htmlspecialchars(s) {
    s = String(s);
    if (s.length==0) { return s; }
    s = s.replace(/&/,'&amp;');
    s = s.replace(/</,'&lt;');
    s = s.replace(/>/,'&gt;');
    s = s.replace(/"/,'&quot;');
    return s;
}

/** liczba, ile ma miec znakow (wypelniane jest zerami z przodu) **/
function makeIDFromNumber(_numer, _fillto) {
    s = String(_numer);
    _fillto -= s.length;
    while(_fillto-->0) {
        s = '0'+s;
    }
    return s;
}