function mainmenu(){
	$(" #nav ul ").css({display: "none"}); // Opera Fix
	var activeMenu =  $("#nav .hovered");
	
	// Add Hover Classes and keep hover color
	$(" #nav li").hover(function() {
		//Show subMenu and change arrow Style
		$(this).find('ul:first').css({visibility: "visible",display: "none"}).slideDown(200);
		$(this).children("a").children('img').attr('src','/images/Navi/Pfeil-weiss.gif');

		// Set Parent styles
		var lastHoveredParentItem = $(this).parent().parent().children("a");	
			
		$(lastHoveredParentItem).addClass("hovered");	
		$(lastHoveredParentItem).children('img').attr('src','/images/Navi/Pfeil-weiss.gif');			
	},function() {
		// Explicitely reset origin style on mouseout
		$(this).find('ul:first').css({visibility: "hidden"});
		if($(activeMenu)[0] != $(this).children("a")[0])
			$(this).children("a").removeClass("hovered");
			
		$(this).children("a").children('img').attr('src','/images/Navi/Pfeil-grau.gif');	
	});
}