/*
Extension developed by David G. Miles (www.z3roadster.net/dreamweaver)
Original Scrollable Area code developed by Thomas Brattli
To add more shock to your site, visit www.DHTML Shock.com
*/

function verifyCompatibleBrowser() {
	this.ver = navigator.appVersion;
    this.dom = document.getElementById ? 1 : 0;
    this.ie5 = (this.ver.indexOf("MSIE 5")>-1 && this.dom) ? 1 : 0;
    this.ie4 = (document.all && !this.dom) ? 1 : 0;
    this.ns5 = (this.dom && parseInt(this.ver) >= 5) ? 1 : 0;

    this.ns4 = (document.layers && !this.dom) ? 1 : 0;
    this.bw = (this.ie5 || this.ie4 || this.ns4 || this.ns5)
    return this;
}

bw = new verifyCompatibleBrowser();


var speed = 50;

var loop, timer;

function ConstructObject(obj,nest) {
    nest = (!nest) ? '':'document.'+nest+'.';
    this.el = bw.dom ? document.getElementById(obj) : bw.ie4 ? document.all[obj] : bw.ns4 ? eval(nest+'document.'+obj) : 0;
    this.css = bw.dom ? document.getElementById(obj).style : bw.ie4 ? document.all[obj].style : bw.ns4 ? eval(nest+'document.'+obj) : 0;
    this.scrollHeight = bw.ns4 ? this.css.document.height : this.el.offsetHeight;
    this.clipHeight = bw.ns4 ? this.css.clip.height : this.el.offsetHeight;
    this.up = MoveAreaUp;
    this.down= MoveAreaDown;
    this.MoveArea = MoveArea;
    this.x;
    this.y;
    this.obj = obj + "Object";
    eval(this.obj + "=this");
    return this;
}

function MoveArea(x,y) {
    this.x = x;
    this.y = y
    this.css.left = this.x + "px";
    this.css.top = this.y + "px";
}

function MoveAreaDown(move) {
	if(this.y > -this.scrollHeight + objContainer.clipHeight) {
    	this.MoveArea(0,this.y-move);
    	if(loop) setTimeout(this.obj+".down("+move+")",speed);
    }
}
function MoveAreaUp(move) {
	if(this.y < 0) {
    	this.MoveArea(0,this.y-move);
    	if(loop) setTimeout(this.obj+".up("+move+")",speed);
    }
}

function PerformScroll(speed) {
	if(initialised) {
    	loop = true;
        if(speed > 0) objScroller.down(speed);
        else objScroller.up(speed);
    }
}

function set_position(anchor) {
    el = bw.dom ? document.getElementById(anchor) : bw.ie4 ? document.all[anchor] : bw.ns4 ? eval(nest+'document.'+anchor) : 0;

    objScroller.down(el.offsetTop);
}

function CeaseScroll() {
	loop = false;
    if(timer) clearTimeout(timer);
}

var initialised;

function InitialiseScrollableArea(anchor) {
	objContainer = new ConstructObject('con_container');
    objScroller = new ConstructObject('con_content','con_container');
    objScroller.MoveArea(0,0);
    objContainer.css.visibility = 'visible';

    if(anchor != undefined && anchor != '') {
    	set_position(anchor);
    }

    initialised = true;
}

function load_header() {
	document.getElementById('ani').src = 'bilder/header.gif';
}