var bilder = new Array();
var zaehler = 0;

var images_pfad = "images/";

function preload (bild1,bild2,link)
{
	bilder[zaehler] = new Array(3);

	bilder[zaehler][0] = new Image ();	
	bilder[zaehler][0].src = images_pfad+bild1;
	bilder[zaehler][1] = new Image ()
	bilder[zaehler][1].src = images_pfad+bild2;
	bilder[zaehler][2] = link;
	++zaehler;
}


// ******************
//
// Rollover
//


function over (bild)
{
if (!document.images)
	return;
for (i=0;i<zaehler;i++)
	{
	if (bilder[i][2] == bild)
		document.images[bilder[i][2]].src = bilder[i][1].src;
	}
}

function out (bild)
{		 
if (!document.images)
	return;
for (i=0;i<zaehler;i++)
	{
	if (bilder[i][2] == bild)
		{
		document.images[bilder[i][2]].src = bilder[i][0].src;
		}
	}
}

// Fenster-zeuchs

browser = navigator.appName;
version = navigator.appVersion.substring(0,1);


// *** fenster oeffnen
function openwin2 (url,x,y,element)
	{
	if (document.layers)
		{
		open_win2(url,x,y,element); fenster_2.focus();
		}
	else
		{
		if ( window.fenster_2 )
			{
			fenster_2.close ();
			while (!fenster_2.closed)
				{
				}
			open_win2(url,x,y,element);
			}
		else
			open_win2(url,x,y,element);
		}
	}

function openwin1 (url,x,y,element)
	{
	if (document.layers)
		{
		open_win1(url,x,y,element); fenster_1.focus();
		}
	else
		{
		if ( window.fenster_1 )
			{
			fenster_1.close ();
			while (!fenster_1.closed)
				{
				}
			open_win1(url,x,y,element);
			}
		else
			open_win1(url,x,y,element);
		}
	}

function open_win3 (url,x,y,element)
{
fenster_3 = window.open (url,"fenster3","width=" + x +",height=" + y + element);		
fenster_3.focus ();
}

function open_win2 (url,x,y,element)
{
fenster_2 = window.open (url,"fenster2","menubar=no,scrollbars=yes,resizable=no,width=" + x +",height=" + y + element);		
fenster_2.focus ();
}
function open_win1 (url,x,y,element)
{
fenster_1 = window.open (url,"fenster1","menubar=no,scrollbars=no,status=yes,resizable=yes,width=" + x +",height=" + y + element);		
fenster_1.focus ();
}

/*function geschichtederms ()
{
openwin2('geschichtederms.htm',786,542,',scrollbars=no,resizable=yes,menubar=no,status=no')
}
*/

function kongress ()
{
openwin2('../kongress/engl/index2.htm',786,393 ,',scrollbars=no,resizable=no,menubar=no,status=no');
}

function emailcheck (email) 
{
return true;
muster = /^[a-zA-Z0-9-\.-_]+@[a-zA-Z0-9-]{2,}\.([a-zA-Z]{2,}\.[a-zA-Z]{2,}|[a-zA-Z]{2,})$/;
if (muster.test(email)) 
	return true;
else
	{
	return false;
	}

}