function popup(Xsize,Ysize,Schieber,file) {
 if (screen.height<600) {
  x=0;
  y=0;
  }
 else {
  x=(screen.width-Xsize)/2;
  y=(screen.height-Ysize)/2;
 }
 WinOpts="width="+Xsize+",height="+Ysize+",left="+x+",top="+y+",scrollbars="+Schieber+",toolbar=no,resizable=no,personalbar=no,location=no,status=no";
 
 var popup=window.open(file,"popup",WinOpts);
 popup.focus();
}

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}