<!--
    if (document.images) {
		/* pro logo aldebu volane z 1. urovne webu */
	    ald1logoakt = new Image();
	    ald1logoakt.src = "images/ald_small_b.gif";
	    ald1logopas = new Image();
	    ald1logopas.src = "images/ald_small_a.gif";
   
		/* pro FYZIKALNI CTVRTKY */
	    ctvrtkyakt = new Image();
	    ctvrtkyakt.src = "images/ctvrtky_b.gif";
	    ctvrtkypas = new Image();
	    ctvrtkypas.src = "images/ctvrtky_a.gif";
    }

    function rollin(imgName) {
	    if (document.images) {
	      document[imgName].src = eval(imgName + "akt.src");
	    }
    }

    function rollout(imgName) {
	    if (document.images) {
	      document[imgName].src = eval(imgName + "pas.src");
   	  }
    }
// -->