$(document).ready(function() {
	// einblenden Layernavigation
	$('a#green-idea').mouseover(function() {
		$('a.hauptnavi').css("backgroundPosition", "0px 0px");
		$('div.navilayer').hide();
		$('#nav_green-idea').show();
		$('a#green-idea').css("backgroundPosition", "0px -50px");
		return false;
	});
	
	$('a#green-stands').mouseover(function() {
		$('a.hauptnavi').css("backgroundPosition", "0px 0px");
		$('div.navilayer').hide();
		$('#nav_green-stands').show();
		$('a#green-stands').css("backgroundPosition", "0px -50px");
		return false;
	});
	
	$('a#green-certification').mouseover(function() {
		$('a.hauptnavi').css("backgroundPosition", "0px 0px");
		$('div.navilayer').hide();
		$('#nav_green-certification').show();
		$('a#green-certification').css("backgroundPosition", "0px -50px");
		return false;
	});
	
	$('a#green-projects').mouseover(function() {
		$('a.hauptnavi').css("backgroundPosition", "0px 0px");
		$('div.navilayer').hide();
		$('#nav_green-projects').show();
		$('a#green-projects').css("backgroundPosition", "0px -50px");
		return false;
	});
	
	$('a#be-green').mouseover(function() {
		$('a.hauptnavi').css("backgroundPosition", "0px 0px");
		$('div.navilayer').hide();
		$('#nav_be-green').show();
		$('a#be-green').css("backgroundPosition", "0px -50px");
		return false;
	});
	
	// ausblenden Layernavigation	
	$('div#head').mouseover(function() {
		$('a.hauptnavi').css("backgroundPosition", "0px 0px");
		$('div.navilayer').hide();
		return false;
	});	
	$('div#content').mouseover(function() {
		$('a.hauptnavi').css("backgroundPosition", "0px 0px");
		$('div.navilayer').hide();
		return false;
	});
});