function oknoImg(url,nazev,x,y) {
 xc=(screen.width / 2) - (x/2);
 yc=(screen.height / 2) - (y/2);
 imgx=x-20;
 imgy=y-20;
 var windows=window.open(url,nazev,'width='+x+',height='+y+',top='+yc+',left='+xc+',menubar=1,toolbar=1,margins=0,scrollbars=0');
 windows.document.write('<body topmargin=0 leftmargin=0 rightmargin=0>');
 windows.document.write('<table cellspacing=0 cellpadding=0 border=0>');
 windows.document.write('<tr><td><img src='+url+' width='+x+' height='+y+' border=0></td></tr></table></body>'); 
}

      menu_but1 = new Image();
	  menu_but1_off = new Image();
      menu_but1.src = '/images/flags/flags_on_cs.gif';
      menu_but1_off.src = '/images/flags/flags_off_cs.gif';
	  menu_but2 = new Image();
	  menu_but2_off = new Image();
      menu_but2.src = 'images/flags/flags_on_en.gif';
      menu_but2_off.src = '/images/flags/flags_off_en.gif';
	  menu_but3 = new Image();
	  menu_but3_off = new Image();
      menu_but3.src = 'images/flags/flags_on_de.gif';
      menu_but3_off.src = 'images/flags/flags_off_de.gif';
	  menu_but4 = new Image();
	  menu_but4_off = new Image();
      menu_but4.src = 'images/flags/flags_on_pl.gif';
      menu_but4_off.src = 'images/flags/flags_off_pl.gif';
	  menu_but5 = new Image();
	  menu_but5_off = new Image();
      menu_but5.src = 'images/flags/flags_on_it.gif';
      menu_but5_off.src = 'images/flags/flags_off_it.gif';
	  menu_but8 = new Image();
	  menu_but8_off = new Image();
      menu_but8.src = 'images/flags/flags_on_ru.gif';
      menu_but8_off.src = 'images/flags/flags_off_ru.gif';

function menu_on(id) {
   var button = document.getElementById("menu" + id); 
   button.src = eval("menu_but" + id + ".src;");
}

function menu_off(id) {
   var button = document.getElementById("menu" + id); 
   button.src = eval("menu_but" + id + "_off.src;");
}

var checker = true;

function scrolldown(element){
  if (checker) {
	
	if (document.getElementById) { // DOM3 = IE5, NS6 
       document.getElementById(element).scrollTop+=10; 
	   setTimeout("scrolldown('" + element + "')",50);
       };
	    
    if (document.layers) { // Netscape 4 
       document.element.scrollTop+=10; 
	   setTimeout("scrolldown('" + element + "')",50);
	   };
	   
	}
}

function scrollup(element){
 if (checker) {
	
	if (document.getElementById) { // DOM3 = IE5, NS6 
       document.getElementById(element).scrollTop+=-10; 
	   setTimeout("scrollup('" + element + "')",50);
       };
	    
    if (document.layers) { // Netscape 4 
       document.element.scrollTop+=-10; 
	   setTimeout("scrollup('" + element + "')",50);
	   };
  }
}
