function Fensterweite() {
  if (window.innerWidth) {
	return window.innerWidth;
  } else if (document.body && document.body.offsetWidth) {
	return document.body.offsetWidth;
  } else {
	return 0; 
  }
}		
function Popup_centered(url,b,h) 
{
	var Name = "Popup_centered";
	var Fensteroptionen = "toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1";
	var maxBreite = Fensterweite();  
	var Breite = b;  
	var Hoehe = h;
	var LinkerRand = (maxBreite - Breite) / 2;

	helpwindow = window.open(url, Name, Fensteroptionen + ',left='+LinkerRand+', top=10, width=' + Breite + ',height=' + Hoehe);
	helpwindow.focus();   	
}	
function SubmitbyLink(myform,mytarget)
{
	eval('document.'+myform+'.action = "'+mytarget+'";');
	eval('document.'+myform+'.submit();');
}
function LinkbyButton(myURL)
{
	window.location = myURL;
}
function LinkbyButtonNewWindow(myURL)
{
	window.open(myURL);
}

function set_cookie ( name, value, exp_y, exp_m, exp_d, path, domain, secure )
{
  var cookie_string = name + "=" + escape ( value );

  if ( exp_y )
  {
    var expires = new Date ( exp_y, exp_m, exp_d );
    cookie_string += "; expires=" + expires.toGMTString();
  }

  if ( path )
        cookie_string += "; path=" + escape ( path );

  if ( domain )
        cookie_string += "; domain=" + escape ( domain );
  
  if ( secure )
        cookie_string += "; secure";
  
  document.cookie = cookie_string;
}

function delete_cookie ( cookie_name )
{
  var cookie_date = new Date ( );  // current date & time
  cookie_date.setTime ( cookie_date.getTime() - 1 );
  document.cookie = cookie_name += "=; expires=" + cookie_date.toGMTString();
}

function get_cookie ( cookie_name )
{
  var results = document.cookie.match ( '(^|;) ?' + cookie_name + '=([^;]*)(;|$)' );

  if ( results )
    return ( unescape ( results[2] ) );
  else
    return null;
}