//Rollover-Buttons vorladen und verarbeiten in der Laufzeit:
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

//Der Zurück-Button
function goback(){
	history.back();
}

//Popup-Fenster in beliebiger Größe öffnen und in der Mitte des Benutzer-Screens platzieren:
var win= null;
function NewWindow(mypage,myname,w,h,scroll){
	var winl = (screen.width-w)/2;
	var wint = (screen.height-h)/2;
	var settings  ='height='+h+',';
   	settings +='width='+w+',';
   	settings +='top='+wint+',';
	settings +='left='+winl+',';
   	settings +='scrollbars='+scroll+',';
   	settings +='resizable=no';
   	settings +='status=no';
	settings +='location=1';
	var popup_done = window.open(mypage,myname,settings);
	win=window.open(mypage,myname,settings);
	if(!popup_done) { 
		alert("Bitte Popup-Blocker deaktivieren.\nGeosys - IB Eber"); 
	}
}

//Popup - Weiterleiten auf Startseite, wenn von externer Quelle geöffnet
function extern(){
	if(window.name != "geosyseber"){
		location = "http://www.geosys-eber.de"
	}
}

//Mail-Eingabe prüfen ////////////////////////////////////////////
function checkMail(s) {
	var a = false;
	var res = false;
	if(typeof(RegExp) == 'function') {
		var b = new RegExp('abc');
		if(b.test('abc') == true){a = true;}
	}
	if(a == true) {
		reg = new RegExp('^([a-zA-Z0-9\\-\\.\\_]+)'+'(\\@)([a-zA-Z0-9\\-\\.]+)'+'(\\.)([a-zA-Z]{2,4})$');
		res = (reg.test(s));
	} else {
		res = (s.search('@') >= 1 &&
		s.lastIndexOf('.') > s.search('@') &&
		s.lastIndexOf('.') >= s.length-5);
	}
	return(res);
}

//Benutzernamen-Eingabe prüfen ////////////////////////////////////////////
function checkBenutzer(s) {
	var res = false;
	reg = new RegExp('^([a-z]{1})'+'(\\.)([a-z]+)');
	res = (reg.test(s));
	return(res);
}