dir="images/";

on=new Image();     on.src=dir+"button_on.gif";
off=new Image();    off.src=dir+"button_off.gif";
over=new Image();    over.src=dir+"button_over.gif";

on2=new Image();     on2.src=dir+"point_on.gif";
off2=new Image();    off2.src=dir+"point_off.gif";

pic1=new Image();	pic1.src=dir+"th_formsteuer.jpg";
pic2=new Image();	pic2.src=dir+"th_bilanzrechner.jpg";
pic3=new Image();	pic3.src=dir+"th_finanzb.jpg";
pic4=new Image();	pic4.src=dir+"th_existenz.jpg";
pic5=new Image();	pic5.src=dir+"th_vermoegensplanung.jpg";
pic6=new Image();	pic6.src=dir+"th_immobilien.jpg";
pic7=new Image();	pic7.src=dir+"th_sonstiges.jpg";

function NewWin (URL,NAME,WIDTH,HEIGHT,SB)
  {
  if (SB){}else SB="yes";
  if (!HEIGHT) HEIGHT=400;
  if (!WIDTH) WIDTH=600;
  OPT="height="+HEIGHT+",width="+WIDTH+",scrollbars="+SB;
  win=window.open(URL,NAME,OPT);
  win.focus();
  }
  
function changePoint(num)
{
akt=num;
document.images.bu_1.src=off.src;
document.images.bu_2.src=off.src;
document.images.bu_3.src=off.src;
document.images.bu_4.src=off.src;

if (num=="1")document.images.bu_1.src=on.src;
if (num=="2")document.images.bu_2.src=on.src;
if (num=="3")document.images.bu_3.src=on.src; 
if (num=="4")document.images.bu_4.src=on.src;
}

function overPoint(num)
{
document.images.bu_1.src=off.src;
document.images.bu_2.src=off.src;
document.images.bu_3.src=off.src;
document.images.bu_4.src=off.src;

if (akt=="1")document.images.bu_1.src=on.src;
if (akt=="2")document.images.bu_2.src=on.src;
if (akt=="3")document.images.bu_3.src=on.src; 
if (akt=="4")document.images.bu_4.src=on.src;

if (num=="1")document.images.bu_1.src=over.src;
if (num=="2")document.images.bu_2.src=over.src;
if (num=="3")document.images.bu_3.src=over.src; 
if (num=="4")document.images.bu_4.src=over.src;
}