var js=0;  if ( document.images ) {  js=1;  }  
var dir = ""      // set your graphics directory
if(js) {
  a = new Image();
  a.src = dir + "einstieg/but01_1.gif";
  a_on  = new Image();
  a_on.src  = dir + "einstieg/but01_2.gif";
  a_ex = new Image();         
  a_ex.src = dir + "einstieg/info_systemhaus.gif";  
  
  b = new Image();
  b.src = dir + "einstieg/but02_1.gif";
  b_on  = new Image();
  b_on.src  = dir + "einstieg/but02_2.gif";
  b_ex = new Image();         
  b_ex.src = dir + "einstieg/info_internet.gif";
  
  c = new Image();
  c.src = dir + "einstieg/but03_1.gif";
  c_on  = new Image();
  c_on.src  = dir + "einstieg/but03_2.gif";
  c_ex = new Image();         
  c_ex.src = dir + "einstieg/info_schulung.gif";  
  
  d = new Image();
  d.src = dir + "einstieg/but04_1.gif";
  d_on  = new Image();
  d_on.src  = dir + "einstieg/but04_2.gif";
  d_ex = new Image();         
  d_ex.src = dir + "einstieg/info_software.gif";  
  
  k = new Image();
  k.src = dir + "einstieg/but05_1.gif";
  k_on  = new Image();
  k_on.src  = dir + "einstieg/but05_2.gif";
  k_ex = new Image();         
  k_ex.src = dir + "einstieg/info_newsletter.gif"; 
  
  l = new Image();
  l.src = dir + "einstieg/but06_1.gif";
  l_on  = new Image();
  l_on.src  = dir + "einstieg/but06_2.gif";
  l_ex = new Image();         
  l_ex.src = dir + "einstieg/info_philo.gif"; 
  
  m = new Image();
  m.src = dir + "einstieg/but07_1.gif";
  m_on  = new Image();
  m_on.src  = dir + "einstieg/but07_2.gif";
  m_ex = new Image();         
  m_ex.src = dir + "einstieg/info_team.gif"; 
  
  n = new Image();
  n.src = dir + "einstieg/but08_1.gif";
  n_on  = new Image();
  n_on.src  = dir + "einstieg/but08_2.gif";
  n_ex = new Image();         
  n_ex.src = dir + "einstieg/info_impressum.gif"; 
  
  o = new Image();
  o.src = dir + "einstieg/but09_1.gif";
  o_on  = new Image();
  o_on.src  = dir + "einstieg/but09_2.gif";
  o_ex = new Image();         
  o_ex.src = dir + "einstieg/info_lage.gif"; 
 
 }
function img_on(img) {   if(js) {  document [img].src = eval(img+"_on.src");
    document["fix"].src = eval(img + "_ex.src");  }  }
function img_off(img) {  if(js) {  document [img].src = eval(img + ".src");
    document["fix"].src = "images/zwisch.gif";   }  }