function exchangeDisplay(id){

			 if(document.getElementById(id).style.display == 'none')
			 {
 			 document.getElementById(id).style.display = 'block';
			 }
			 else
			 {
			  document.getElementById(id).style.display = 'none';
			 }

			}
			
function Display_on(id){
				document.getElementById(id).style.display = 'block';
			}
			
function Display_off(id){
				document.getElementById(id).style.display = 'none';
			}			
function Menue () {
			  if (typeof window.pageYOffset == "number") {
 			   if (NS4) {
    			  getElement("id", "Nav").top = window.pageYOffset + 50;
   			 } else {
     			 getElement("id", "Nav").style.top = window.pageYOffset + 50;
   			 }
 			 } else {
  			  if (typeof document.body.scrollTop == "number")
     			 getElement("id", "Nav").style.top = document.body.scrollTop + 50;
 			 }
  			if (OP)
   			 getElement("id", "NavLinks").style.pixelTop = NavLinksPos;
 			 if (NS4) {
   			 getElement("id", "Nav").visibility = "show";
 			 } else {
    			getElement("id", "Nav").style.visibility = "visible";
  			}
			}
			
function noMenue () {
 			 if (NS4) {
  			  getElement("id", "Nav").visibility = "hide";
 			 } else {
   			 getElement("id", "Nav").style.visibility = "hidden";
 			 }
			}

			function handleMove (ev) {
 			 if (!ev)
   			 ev = window.event;
 			 var mausposition = ev.pageX ? ev.pageX : ev.clientX;
  			if (mausposition < 220) {
     			 //Menue();
     			 var value = Element.getOpacity('bg_navigation');
     			 new Effect.Opacity('bg_navigation', {duration:0.6, to:0.8});
     			 if(value==0) {
     			 	
     			 }
     			 //alert(value);
  			} else {
   			 if (mausposition > 220) {
     			 //noMenue();
     			 new Effect.Opacity('bg_navigation', {duration:0.6, to:0});
   			 }
  			}
			}

function Event_init () {
 			 if (document.addEventListener) {
   			 document.addEventListener("mousemove", handleMove, true);
 			 } else {
    			if (NS4) {
     			 document.captureEvents(Event.MOUSEMOVE);
      			document.onmousemove = handleMove;
    			} else {
     			 document.body.onmousemove = handleMove;
   			 }
 			 }
 			 if (OP) {
   			 NavLinksPos = 42; // Position des Bereiches NavLinks
   			 getElement("id", "NavLinks").style.pixelTop = NavLinksPos;
  			}
			}
			
function Preload_images() {
			bg = new Image();
			bg.src = "../images/bg.jpg";
			}

function off () {
	
	Effect.Fade('content_intro');
}

function off_delay () {
	setTimeout("off()",2000);
}

function impressum () {
	javascript:exchangeDisplay('content_contact');
	javascript:exchangeDisplay('content_impressum');
}


function contact_on () {
	javascript:Display_on('content_contact');
	javascript:Display_off('content_impressum');
}


function intro () {
	/*new Effect.Opacity("bg", {duration:1.0, from:1.0, to:0.0});
	*/
	Effect.Fade('container_box_intro');
	Effect.Fade('intro_overlayer')
	//Effect.Fade('content_intro');
	//javascript:Display_on('content');
}

function intro_delay () {
	setTimeout("intro()",2000);
}