/*    open_popup        */

function open_popup() {
	document.getElementById("popup").style.display = "block";
}

function close_popup() {
	document.getElementById("popup").style.display = "none";
}


/*    scroll        */

y=0; doScroll=0;


function begin(par) 
{
	doScroll=1;
	scroll(par);
}

function end()
{
	doScroll=0;
}

function scroll(par) 
{

	
	y+=par;
	if (y>0) y=0;
	document.getElementById("popup_inner_content").style.top = y;
	if (doScroll) setTimeout("scroll("+par+")",10);
	
}

/*    positionierung        */

function positionierung()
{

	var popup_width = 700;
	var popup_height = 400;
	
	if (document.all)
	 {
		breite = document.body.clientWidth;
		hoehe  = document.body.clientHeight;
	 }
	else if (document.getElementById)
	 {
		breite = window.innerWidth;
		hoehe  = window.innerHeight;
	 }

	left_position = eval(-(popup_width/2)+(breite/2));
	top_position  = eval(-(popup_height/2)+(hoehe/2));

	//alert(left_position);
	//alert(top_position);
	var POPUPObject = document.getElementById("popup");

	if (POPUPObject)
	{
		POPUPObject.style.width = popup_width+"px";
		POPUPObject.style.height = popup_height+"px";
		POPUPObject.style.left = left_position+"px";
		POPUPObject.style.top  = top_position+"px";
	}



}

window.onresize = positionierung

positionierung();