/* <![CDATA[ */

var imgs = new Array(); 
var imgcnt = 0; 
var thisimg = 0;

imgs[imgcnt++] = '/bilder/kopfgrafiken/praxis01.jpg';
imgs[imgcnt++] = '/bilder/kopfgrafiken/praxis02.jpg';
imgs[imgcnt++] = '/bilder/kopfgrafiken/praxis03.jpg';
imgs[imgcnt++] = '/bilder/kopfgrafiken/praxis04.jpg';
imgs[imgcnt++] = '/bilder/kopfgrafiken/praxis05.jpg';
 
function nextImg() {
  if (document.images) {
      thisimg++;
      if (thisimg >= imgcnt) 
          thisimg = 0;
document.getElementById("rollimg").src = imgs[thisimg];
  }
}

function prevImg() {
    if (document.images) {
        thisimg--;
        if (thisimg < 0) 
            thisimg = imgcnt-1;
document.getElementById("rollimg").src = imgs[thisimg];
    }
}
/* ]]> */