if(window.vielePfotenWin)
{
	// window open? close it!
	window.vielePfotenWin.close();
}

screenWidth  = screen.width;
screenHeight = screen.height;
winWidth  = 160;
winHeight = 250;
winTop	  = 0;winLeft	  = screenWidth-winWidth;// www.beta.ah.de/Kunden/clients/tierheim
vielePfotenWin = window.open('http://www.viele-pfoten.de/search.php','Hauptfenster','width='+winWidth+',height='+winHeight+',left='+winLeft+',top='+winTop+',scrollbars=no, resizable=no');
window.vielePfotenWin.focus();