var agt=navigator.userAgent.toLowerCase();
// browserVer und Version bestimmen
var nav = ((agt.indexOf('mozilla')!=-1) && ((agt.indexOf('spoofer')==-1) && (agt.indexOf('compatible') == -1)));
var ie = (agt.indexOf("msie") != -1);
var chrome = (agt.indexOf("chrome") != -1);
var safari = (agt.indexOf("safari") != -1);
var gecko_opera = (agt.indexOf("gecko") != -1) || (agt.indexOf("opera") != -1);
var version = parseInt(navigator.appVersion);
var ns = navigator.userAgent.indexOf('Netscape')!=-1;
var ns6 = (!document.layers) && ns?true:false;

// browserVerversion in Ordnung?
var browserVer=0;
if ((nav && version > 2) || (ie && version > 3) || gecko_opera) {
	browserVer = 1;
} else { 
	browserVer = 0;
}

var windowwidth=0;

var defInfo = "CalSky - calculates the sky for you, the astronomical calendar of your sky!";

// Functions for line info
// function s(txt) { window.status=txt; return 1;}
function s(txt) { 
	//window.status=txt;
	if (document.F && document.F.objectname) {
		if (txt.length) {
			txt = txt.replace(/Alp \s*/,"alpha ");
			txt = txt.replace(/Bet \s*/,"beta ");
			txt = txt.replace(/Gam \s*/,"gamma ");
			txt = txt.replace(/Del \s*/,"delta ");
			txt = txt.replace(/Eps \s*/,"epsilon ");
			txt = txt.replace(/Zet \s*/,"zeta ");
			txt = txt.replace(/Eta \s*/,"eta ");
			txt = txt.replace(/The \s*/,"theta ");
			txt = txt.replace(/Iot \s*/,"iota ");
			txt = txt.replace(/Kap \s*/,"kappa ");
			txt = txt.replace(/Lam \s*/,"lambda ");
			txt = txt.replace(/My \s*/,"my ");
			txt = txt.replace(/Ny \s*/,"ny ");
			txt = txt.replace(/Xi \s*/,"xi ");
			txt = txt.replace(/Omi \s*/,"omicron ");
			txt = txt.replace(/Pi \s*/,"pi ");
			txt = txt.replace(/Rho \s*/,"rho ");
			txt = txt.replace(/Sig \s*/,"sigma ");
			txt = txt.replace(/Tau \s*/,"tau ");
			txt = txt.replace(/Yps \s*/,"ypsilon ");
			txt = txt.replace(/Phi \s*/,"phi ");
			txt = txt.replace(/Chi \s*/,"chi ");
			txt = txt.replace(/Psi \s*/,"psi ");
			txt = txt.replace(/Ome \s*/,"omega ");
			document.F.objectname.value = txt;
		}
	//	  else document.F.objectname.value=defInfo;
		  else document.F.objectname.value=txt;
	}
}

s(defInfo);

function myMouseMove() { }

// Functions for OnMouseOver/OnMouseOut
if (browserVer == 1) {
	button = new Array();
}


function getAbsolutePosition(element)
{
  var r = { x: element.offsetLeft, y: element.offsetTop };
  if (element.offsetParent) {
	var tmp = getAbsolutePosition(element.offsetParent);
	r.x += tmp.x;
	r.y += tmp.y;
  }
  return r;
};

function getRelativeCoordinates(event, reference) 
{
  var x, y;
  event = event || window.event;
  var el = event.target || event.srcElement;
  if (ie) {
	x = event.offsetX; y = event.offsetY;
  }
  else if (!chrome && !safari && !window.opera && typeof event.offsetX != 'undefined') {
	// Use offset coordinates and find common offsetParent
	var pos = { x: event.offsetX, y: event.offsetY };
	// Send the coordinates upwards through the offsetParent chain.
	var e = el;
	while (e) {
      e.mouseX = pos.x;
      e.mouseY = pos.y;
      pos.x += e.offsetLeft;
      pos.y += e.offsetTop;
      e = e.offsetParent;
	}

	// Look for the coordinates starting from the reference element.
	var e = reference;
	var offset = { x: 0, y: 0 }
	while (e) {
      if (typeof e.mouseX != 'undefined') {
    	x = e.mouseX - offset.x;
    	y = e.mouseY - offset.y;
    	break;
      }
      offset.x += e.offsetLeft;
      offset.y += e.offsetTop;
      e = e.offsetParent;
	}

	// Reset stored coordinates
	e = el;
	while (e) {
      e.mouseX = undefined;
      e.mouseY = undefined;
      e = e.offsetParent;
	}
  }
  else {
	// Use absolute coordinates
	var pos = getAbsolutePosition(reference);
	x = event.pageX - pos.x;
	y = event.pageY - pos.y;
  }
  return { x: x, y: y };
}

// Requires hidden imgmapx, imgmapx
mccalled=0;
function mc(event)
{
	reference = document.getElementById('chart');
	if (!mccalled && reference) {
		pos = getRelativeCoordinates(event,reference);
		if (document.forms[0].imgmapx) document.forms[0].imgmapx.value=pos.x; 
		if (document.forms[0].imgmapy) document.forms[0].imgmapy.value=pos.y;
		document.forms[0].submit();
		mccalled=1;
	}
	return true;
}


function Grafik(name,bild) {
	base=this;
	base.nm=name;
	base.bild=bild;
	if (browserVer == 1) {
// base.name = new Image();
// base.name.src = "/observer/menu/" + bild + "0.gif";
// base.name_invers = new Image();
// base.name_invers.src = "/observer/menu/" + bild + "1.gif";
	}
}


function wechsle_normal(id,state,info,lang) {
	if ((browserVer == 1 && !state)) {
		if (!button[id].name) {
    		button[id].name = new Image();
			if (!lang) lang='';
    		button[id].name.src = "/observer/menu/" + button[id].bild + "0" + lang +".gif";
		}
		document[id].src = button[id].name.src;
	}
//s(defInfo);
}

function wechsle_invers(id,state,info,lang) {
	if (browserVer == 1 && !state) {     
		if (!button[id].name_invers) {
    		 button[id].name_invers = new Image();
			 if (!lang) lang='';
    		 button[id].name_invers.src = "/observer/menu/" + button[id].bild + "1" + lang +".gif";
		 }
		 document[id].src = button[id].name_invers.src;
	}
	//if (info) window.status=info;
}

function wechsle_alle_invers(id) {
	if (browserVer == 1) {
    	for (var name in button) {
    		if (name != id) wechsle_normal(name);
    	}
	}
}


function loadImages() {
	if (browserVer == 1) {
	    	button["Intro"] = new Grafik("Intro","Intro");
    	button["Calendar"] = new Grafik("Calendar","Calendar");
    	button["Sun"] = new Grafik("Sun","Sun");
    	button["Moon"] = new Grafik("Moon","Moon");
    	button["Planets"] = new Grafik("Planets","Planets");
    	button["Comets"] = new Grafik("Comets","Comets");
    	button["Asteroids"] = new Grafik("Asteroids","Asteroids");
    	button["Meteors"] = new Grafik("Meteors","Meteors");
    	button["Deep-Sky"] = new Grafik("Deep-Sky","Deep-Sky");
    	button["Satellites"] = new Grafik("Satellites","Satellites");
	  	}
}
loadImages();


// Pop-up Window for Spacewarn
var winname='viewer';
var defwidth=480;
var defheight=320;
var winfeatures = 'scrollbars,resizable';
function popup(url,win,size,height,features) {
	if (win) { winname=win; }
	if (features) { winfeatures=features; }
	if (size) { defwidth=size; defheight=size; }
	if (height) { defheight=height; }
	winfeatures = "width="+defwidth+",height="+defheight+","+winfeatures;
	if (winname) { newwin = window.open(url, winname, winfeatures); }
	else { newwin = window.open(url, winfeatures); }	
	newwin.focus();	
}

var winext="external";
function launch(url,win) { 
	w=winext; 
	if (win) {w=win;} 
	newwin = window.open(url,w);
	newwin.focus();	
}


var standbyText = ''
function showstandby()
{
  if (standbyText.length) {
	var w = 200;
	var h = 300;
	if (document.getElementById("loadingIE")) {
    	document.getElementById("loadingIE").innerHTML=standbyText;
		document.getElementById("loadingIE").style.top = h;
		document.getElementById("loadingIE").style.left = w;
		document.getElementById("loadingIE").style.visibility = "visible";
	}	
	else if (document.layers && document.layers.loading) {
		document.layers.loading.document.open();
    	document.layers.loading.document.write(standbyText);
    	document.layers.loading.document.close();
    	document.layers.loading.style.top = h;
    	document.layers.loading.style.left = w;
    	document.layers.loading.style.visibility = "visible";
	}
	else if (document.all && window.print && document.all.loadingIE && standbyText) {
		document.all.loadingIE.innerHTML = standbyText;
		document.all.loadingIE.style.top  = h;
		document.all.loadingIE.style.left = w;
		document.all.loadingIE.style.visibility = "visible";
	}  
  }
}

var toutId;

function hidestandby() {
	if (toutId) { window.clearTimeout(toutId); toutId=0; }
	if (standbyText.length) {
		var w = -200;
		var h = -100;
		if (document.getElementById("loadingIE")) {
				document.getElementById("loadingIE").style.visibility = "hidden";
				document.getElementById("loadingIE").style.top = h;
				document.getElementById("loadingIE").style.left = w;
				//document.getElementById("loadingIE").innerHTML = "";
		}	
		else if (document.layers && document.layers.loading) {
 			document.layers.loading.visibility = 'hidden';
		    document.layers.loading.style.top = h;
    		document.layers.loading.style.left = w;
	    	//document.layers.loading.document.open();
			//document.layers.loading.document.write("");
	    	//document.layers.loading.document.close();
//			var main = document.layers.loading.parentLayer;
//			main.visibility = 'visible';
		} else if (document.all && window.print && document.all.loadingIE) {
     		document.all.loadingIE.style.visibility = "hidden";
			document.all.loadingIE.style.top  = h;
			document.all.loadingIE.style.left = w;
			//document.all.loadingIE.innerHTML = "";
		}
	}
}

function loader() {
	windowwidth = window.innerWidth? window.innerWidth : document.body.clientWidth? document.body.clientWidth : document.documentElement.clientWidth? document.documentElement.clientWidth : 0; 
	if (windowwidth>0 && document.forms[0]['wwidth']) { document.forms[0]['wwidth'].value=windowwidth; }
	hidestandby();
}

function drawBox( win, text, title,width) {
	if (!width) { width=160; }
	var w1=width-2; var w2=width-18;

	win.document.writeln('<table width="'+width+'" cellspacing="0" cellpadding="0" border="0">');
	win.document.writeln('<tr><td><img src="icons/empty.gif" width=1 height=1></td><td><img src="icons/empty.gif" width="8" height="1"></td><td colspan="2"><img src="icons/empty.gif" width="'+w2+'" height="1"></td><td><img src="icons/empty.gif" width="8" height="1"></td><td><img src="icons/empty.gif" width="1" height="1"></td></tr>');

	if (title) {
		win.document.writeln('<tr><th class="titleBar" colspan="6"><img src="icons/empty.gif" width="1" height="2"></th></tr>');
		win.document.writeln('<tr><th class="titleBar"><img src="icons/empty.gif" width="1" height="1"></th><th class="titleBar"><img src="icons/empty.gif" width="8" height="1"></th>');
		win.document.writeln('<th align="left" colspan="2" class="titleBar">');
		win.document.writeln(title);
		win.document.writeln('</th><th class="titleBar"><img src="icons/empty.gif" width="1" height="1"></th><th class="titleBar"><img src="icons/empty.gif" width="1" height="1"></th></tr>');
		win.document.writeln('<tr><th class="titleBar" colspan="6"><img src="icons/empty.gif" width="1" height="2"></th></tr>');
		win.document.writeln('<tr><td width="1" rowspan="2" class="boxBorder"><img src="icons/empty.gif" width="1" height="10"></td>');
		win.document.writeln('<td colspan="4" height="10"><img src="icons/empty.gif" width="'+w1+'" height="10" alt="" border="0"></td>');
		win.document.writeln('<td width="1" rowspan="2" class="boxBorder"><img src="icons/empty.gif" width="1" height="10"></td></tr>');
	} 
	else {
	   win.document.writeln('<tr><th class="titleBar" colspan="6"><img src="icons/empty.gif" width="1" height="1"></th></tr>');
	   win.document.writeln('<tr><td width="1" rowspan="2" class="boxBorder"><img src="icons/empty.gif" width="1" height="1"></td>');
	   win.document.writeln('<td colspan="4" height="1"><img src="icons/empty.gif" width="'+w1+'" height="1" alt="" border="0"></td>');
	   win.document.writeln('<td width="1" rowspan="2" class="boxBorder"><img src="icons/empty.gif" width="1" height="1"></td></tr>');
	}

	win.document.writeln('<tr><td></td><td colspan="2" valign="top">'+text+'</td><td></td></tr>');
	win.document.writeln('<tr><td class="boxBorder" height="1" colspan="6"><img src="icons/empty.gif" width="'+width+'" height="1"></td></tr>');
	win.document.writeln('<tr><td height="10" colspan="6"><img src="icons/empty.gif" width="1" height="10" alt="" border="0"></td></tr></table>');
}


function refresh_data(selected_data)
{
	opener.document.forms['post'].data.value = selected_data;
	opener.focus();
	window.close();
}


// Image Swapper
var imagorg = new Array();

function ImagesOff()
{
	var empty = 'icons/empty.gif';
	for (var i = 0; i < document.images.length; i++) {
	if(document.images[i].name.indexOf("Deep-Sky")!=-1 || document.images[i].name.indexOf("Supernova")!=-1 || document.images[i].name.indexOf("Nova")!=-1)
		document.images[i].src = empty;
	}
}

function ImagesOn()
{
  if (imagorg.length)
	for (var i = 0; i < document.images.length; i++) {
	  if(document.images[i].name.indexOf("Deep-Sky")!=-1 || document.images[i].name.indexOf("Supernova")!=-1 || document.images[i].name.indexOf("Nova")!=-1)
		document.images[i].src = imagorg[i];
	}
}

function ImagesSwitch()
{
if (document.forms[0].hideimages.checked) ImagesOff(); else ImagesOn();
}

function ImagesSave()
{
if (document.images)
	for (var i = 0; i < document.images.length; i++) imagorg[i] = document.images[i].src;
}

function PrintImageMap()
{
	if (chartmap) {
		// Netscape before v6 did not support innerHTML
		if ((!ie && !ns6) || !document.getElementById("map")) {
			document.writeln(chartmap); // add map at end of file
		}
		else document.getElementById("map").innerHTML = chartmap;
		s(defInfo);
		hidestandby();
	}
}

function toggleGlossary() {
	if (browserVer)
	{
		var toc=document.getElementById('glossary');
		var but=document.getElementById('hideglos');
		if (but) 
		{
			if(!but.checked) {
				toc.style.display = tocWas;
			} else {
				tocWas = toc.style.display;
				toc.style.display = 'none';
			}
		}
	}
}

function toggleRadio(switcher, name) {
	var chbox=document.getElementById('manual');
	var radio = document.forms[0][name];
	if (chbox && radio) {
		if (chbox.checked == true) {
    		var deactivate = false;
		} else {
    		var deactivate = true;
		}
		for (var i = 0; i < radio.length; i++) {
    		radio[i].disabled = deactivate;
		}
	}
}

function setCheckedValue(radio, newValue) {
	var radioObj = document.forms[0][radio];
	if(!radioObj) return;
	var radioLength = radioObj.length;
	if(radioLength == undefined) {
		radioObj.checked = (radioObj.value == newValue.toString());
		return;
	}
	for(var i = 0; i < radioLength; i++) {
		radioObj[i].checked = false;
		if(radioObj[i].value == newValue.toString()) {
			radioObj[i].checked = true;
		}
	}
}

function submitenter(field,e)
{
	var keycode;
	if (window.event) keycode = window.event.keyCode;
	else if (e) keycode = e.which;
	else return true;

	if (keycode == 13) {
		field.form.submit();
		return false;
	}
	else return true;
}

function hrefCtrlLink(ths, event, ctrlurl)
{
	if (event.ctrlKey==true) ths.href=ctrlurl;
	return false;
}



function setCookie(name, wert, domain, expires, path, secure){
   var cook = name+'='+unescape(wert);
   cook += (domain) ? "; domain="+ domain : "";
   cook += (expires) ? "; expires="+expires : "";
   cook += (path) ? "; path="+path : "";
   cook += (secure) ? "; secure" : "";
   document.cookie = cook;
}


var fontsize = 100.01;

function setFontsize(size) {

  if (navigator.cookieEnabled) {

    var cookie, pair;
    var cookies = document.cookie.split(';');
    var len = cookies.length;
    var set_cookie = true;

    for(var i=0; i < len; i++) {
      cookie = cookies[i];
      while (cookie.charAt(0)==' ') cookie = cookie.substring(1, cookie.length);
      pair = cookie.split('=');

      if ((pair[0] == 'fontsizeR') || (pair[0] == 'fontsize')) {
        fontsize = pair[1];
        break;
      }
    }

    if (size == 'reset') {
      fontsize = 101;
    } else if (size == '') {
      set_cookie = false;
    } else {
      fontsize = (fontsize*1.0 + size*1.0);
    }
    
    var html = document.getElementsByTagName('html')[0];

//alert(html.style.fontSize);

    html.style.fontSize = (fontsize + '%');
//alert(html.style.fontSize);
    if (set_cookie) {
      setCookie('fontsize', fontsize, null, null, '/', null);
        expires = new Date();
        next_year = expires.getTime() + (60*60*24*365);
        expires.setTime(next_year);
      setCookie('fontsizeR', fontsize, null, expires.toGMTString(), '/', null);
    }

//    alert(document.cookie);
  }

}

function showHide(id)
{ 
 if(document.getElementById) {
  var style = document.getElementById(id).style
  if (style.visibility == "hidden")
   style.visibility = "visible";
  else  
   style.visibility = "hidden";
 }
}


function contentHide(d) {
 if(document.getElementById) {
  document.getElementById(d).style.display = "none";
 }
}
function contentShow(d) {
 if(document.getElementById) {
  document.getElementById(d).style.display = "block";
 }
}

function addField(name, value)
{
   var form = document.forms[0];
   var el = document.createElement("input");
   el.type = "hidden";
   el.name = name;
   el.value = value;
   form.appendChild(el);
}

function dhtmlLoadScript(url)
{
   var e = document.createElement("script");
   e.src = url;
   e.type="text/javascript";
   document.getElementsByTagName("head")[0].appendChild(e); 
}

function gonewsite(lang)
{
 var t="Following this link will change your coordinates within CalSky. Please confirm to continue.";
 if (lang==1) t="Das Ausführen dieses Links wird Ihre Koordinaten in CalSky verändern. Wollen Sie ihm trotzdem folgen?";
 return(confirm(t));
}