var img          = new Array("implantate","mundhygiene","zahnlucke","amalgam","lasertherapie","praxis","drfuelop");  //namen der Bilder 
var imgtxt       = new Array("Implantate","Mundhygiene","Zahnl\u00fccke","Amalgam","Lasertherapie","Praxis","Dr.F\u00fcl\u00f6p"); //Statustext der Bilder
var norm         = new Array(img.length);       
var over         = new Array(img.length);       
var loaded       = false; 

function preload() {
  for (i=0;i<img.length;i++) {
        norm[i]= new Image();
        norm[i].src="images/navigation/"+img[i]+"_n.gif";
        over[i]= new Image();
        over[i].src="images/navigation/"+img[i]+"_r.gif";
  }
  loaded=true;
} 

function overaction(nr) {
  if (loaded)   {
    document.images["nav_"+nr].src = over[nr].src;
    window.status = imgtxt[nr];
  }
}
        
function outaction(nr)       {
  if (loaded)   {
    document.images["nav_"+nr].src = norm[nr].src;
    window.status = '';
  }
}