var nr = 0;
var maxbuttons = 4;

var meta = new Array(maxbuttons);
var metaOver = new Array(maxbuttons);

for (i=0; i < maxbuttons; i++) {
  meta[i] = new Image(); 
  meta[i].src = "files/layout/images/navigation/metanav/metanav_0"+i+".gif";
  
  metaOver[i] = new Image(); 
  metaOver[i].src = "files/layout/images/navigation/metanav/metanav_aktiv_0"+i+".gif";
}

function rolloverMeta(nr) 
{ 
	document['buttonMeta'+nr].src = metaOver[nr].src;
}

function rolloutMeta(nr) 
{ 
	document['buttonMeta'+nr].src = meta[nr].src;
}