var fct_scrupdown;
var dir;

function scr(){
var my_top= parseInt(document.getElementById("stage").style.top);
var my_offset= parseInt(document.getElementById("stage").offsetHeight);
var my_container= parseInt(document.getElementById("container").offsetHeight);

document.getElementById("stage").style.top=my_top+dir+"px";
if(my_top+dir <= -(my_offset-my_container)){window.clearInterval(fct_scrupdown); return;};
if(my_top==0 && dir > 0) {window.clearInterval(fct_scrupdown);};

}
function strt (vl){


var my_top= parseInt(document.getElementById("stage").style.top);
var my_offset= parseInt(document.getElementById("stage").offsetHeight);
var my_container= parseInt(document.getElementById("container").offsetHeight);

if((my_top>=0 && vl > 0) || (my_top <= -(my_offset-my_container) && vl < 0)) {return;};
dir=vl;
fct_scrupdown=window.setInterval('scr()',10);

}
function stp (){
window.clearInterval(fct_scrupdown);
dir=0;
}
function showmap()
{
window.open ("map.html","Anfahrtsplan","width=590, height=580, toolbar=no, menu=no");
}

function show_hide()
{
var my_offset= parseInt(document.getElementById("stage").offsetHeight);
var my_container= parseInt(document.getElementById("container").offsetHeight);

if (my_offset <= my_container+22)
{
parent.document.getElementById("more").style.visibility="hidden";
parent.document.getElementById("btnUp").style.visibility="hidden";
parent.document.getElementById("btnDown").style.visibility="hidden";
}
else
{
parent.document.getElementById("more").style.visibility="visible";
parent.document.getElementById("btnUp").style.visibility="visible";
parent.document.getElementById("btnDown").style.visibility="visible";
}

}