try {
 	window.onscroll = setNavPosition;
 }
 catch(e) {
 	document.documentElement.onscroll = setNavPosition;
 }
 function setNavPosition(){
 $('#linker_seiten_container').stop();
 try {
		 if (document.body.scrollTop > document.documentElement.scrollTop) {
			 var targetPosition = document.body.scrollTop ;
 		}
		else {
 			var targetPosition = document.documentElement.scrollTop;
 		}
 	}
 catch(e) {
 		var targetPosition = document.documentElement.scrollTop;
 	}

 $('#linker_seiten_container').animate({top: targetPosition + 300}, 1000);
 }