function open_news(nr,cnt){
    
   
      //val = nr + 1;
      var ar = document.getElementById("master_news").getElementsByTagName("span"); 
      
      for (var i=0; i < cnt; i++){
        if(nr!=i){
          document.getElementById(ar[i].id).style.display = "none";
          document.getElementById("news_head_" + i).className = 'title_news'; 
        }else{
          if(document.getElementById(ar[nr].id).style.display == "block"){
            document.getElementById(ar[nr].id).style.display = "none";
            document.getElementById("news_head_" + i).className = 'title_news';
          }else{
            document.getElementById(ar[nr].id).style.display = "block";
            document.getElementById("news_head_" + i).className = 'title_news_akt';
          }
        }
      } 
       
        
        /* if(el.style.display != "block"){ 
          for (var i=0; i<ar.length; i++){
            if (ar[i].className=="sub_news"){
              ar[i].style.display = "none";
            }
          }
          el.style.display = "block";
        }else{
          el.style.display = "none";
        } */
    
    
    for (var i=0; i < cnt; i++){
      //document.getElementById("news_head_" + nr).className = 'title_news';
    }
    
    //document.getElementById("news_head_" + nr).className = 'title_news_akt';
    
}