var s_aktiv = 0;
var s_max_scroll = 150;

//Browser innere Fensterhöhe ermitteln
function s_getHeight() {
	var s_height = document.body.clientHeight;
	return s_height;
}

//Inhaltshöhe ermitteln
function s_getHH() {
	s_ih = s_getHeight() - 360;
	//Abstand Scrollbuttons setzen
	document.getElementById("scroll_space2").style.height = s_ih - 34;
	//alert((s_ih-34));
	document.getElementById("content").style.height = s_ih;
	//alert(document.getElementById("content_sub_menu").innerHTML);
	//alert(GetElementHeight(document.getElementById("content_sub_menu")));
	
		
		if (GetElementHeight(document.getElementById("content_sub_menu")) > 10) {
			if (GetElementHeight(document.getElementById("content_sub_menu")) > s_ih) {
				//alert(GetElementHeight(document.getElementById("content_sub_menu")) +'xxx'+ s_ih);
				document.getElementById("s_scroll_up_img").style.display = 'inline';
				document.getElementById("s_scroll_down_img").style.display = 'inline';
			} else {
				document.getElementById("s_scroll_up_img").style.display = 'none';
				document.getElementById("s_scroll_down_img").style.display = 'none';
			}
			//document.getElementById("content_sub_menu").style.height = '1px';
		} else {
			document.getElementById("s_scroll_up_img").style.display = 'none';
			document.getElementById("s_scroll_down_img").style.display = 'none';
		}
	
	return true;
}

//Runterscrollen
function s_go_down(){
	var s_top = 0;
	s_top = document.getElementById("content_sub_menu").style.top;
	s_ih = s_getHeight() - 360; //Höhe vom Content Bereich
	s_mm = GetElementHeight(document.getElementById("content_sub_menu")); //Höhe vom Inhalt gesamt
	s_max_scroll = (s_mm - s_ih); //Scrollbare höhe
	document.getElementById("content").style.height = s_ih;
	s_top = parseInt(s_top);
	if (Math.abs(s_top) < s_max_scroll) s_top = s_top - 5;
	document.getElementById("content_sub_menu").style.top = s_top;
}

//Raufscrollen
function s_go_up(){
	var s_top = 0;
	s_getHH(); //Höhe von Contentfeld ermitteln und setzen
	s_top = document.getElementById("content_sub_menu").style.top;
	s_top = parseInt(s_top);
	if (s_top < 0) s_top = s_top + 5;
	document.getElementById("content_sub_menu").style.top = s_top;
}

function s_down(){
	s_aktiv = window.setInterval('s_go_down()',20);
	document.getElementById("s_scroll_down_img").src = '/gif/down_over.gif';
}

function s_up(){
	s_aktiv = window.setInterval('s_go_up()',20);
	document.getElementById("s_scroll_up_img").src = '/gif/up_over.gif';
}

function s_stop(){
	clearInterval(s_aktiv);
	document.getElementById("s_scroll_down_img").src = '/gif/down.gif';
	document.getElementById("s_scroll_up_img").src = '/gif/up.gif';
}

function load_getHH() {
	s_getHH();
	getHH();
}

window.onresize = load_getHH;