function showhiscon(jahr){
             
             
                 
              
                 var req = null;

                try{
                    req = new XMLHttpRequest();
                }
                catch (ms){
                    try{
                        req = new ActiveXObject("Msxml2.XMLHTTP");
                    } 
                    catch (nonms){
                        try{
                            req = new ActiveXObject("Microsoft.XMLHTTP");
                        } 
                        catch (failed){
                            req = null;
                        }
                    }  
                }

                if (req == null)
                      alert("Error creating request object!");
                 
                 
                   
                 
                  var url2= 'inc/content.ajax.php?jahr=' + jahr;
                 
                  req.open("GET", url2, true);

              
                req.onreadystatechange = function(){            
                    switch(req.readyState) {
                    
                            case 4:
                            
                            if(req.status!=200) {
                                 alert(url2 + req.status);
                            }else{    
                                
                               
                                document.getElementById('hiscon').innerHTML = req.responseText;
                                                                     
                            }
                            break;
                    
                            default:
                                return false;
                            break;     
                        }
                    };
                    
                  
  
                  req.setRequestHeader("Content-Type",
                                      "application/x-www-form-urlencoded");
                  req.send(null);
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
                 
                
                
                   
                    
                 
                     
            }
            
            function showhistopic(show)
            {
                              
                 var req = null;

                try{
                    req = new XMLHttpRequest();
                }
                catch (ms){
                    try{
                        req = new ActiveXObject("Msxml2.XMLHTTP");
                    } 
                    catch (nonms){
                        try{
                            req = new ActiveXObject("Microsoft.XMLHTTP");
                        } 
                        catch (failed){
                            req = null;
                        }
                    }  
                }

                if (req == null)
                      alert("Error creating request object!");
                 
                 
                   
                 
                  var url2= 'inc/content.ajax.topic.php?show=' + show;
                 
                  req.open("GET", url2, true);

              
                req.onreadystatechange = function(){            
                    switch(req.readyState) {
                    
                            case 4:
                            
                            if(req.status!=200) {
                                 alert(url2 + req.status);
                            }else{    
                                
                               
                                document.getElementById('histopic').innerHTML = req.responseText;
                                                                     
                            }
                            break;
                    
                            default:
                                return false;
                            break;     
                        }
                    };
                    
                  
  
                  req.setRequestHeader("Content-Type",
                                      "application/x-www-form-urlencoded");
                  req.send(null);
                  
              }
            
            function settmpfield(show)
            {
                  document.getElementById('ajax_atm').value = show;
                  
            }
            
            function checkarrows()
            {
                  var minimum = document.getElementById('ajax_min').value;
                  var maximum = document.getElementById('ajax_max').value;
                  var atm = document.getElementById('ajax_atm').value;
                  
                  if(minimum == atm)
                  {
                       document.getElementById('link_left').innerHTML = "<img src='img/his_left_lo.png' border='0'>";
                  }
                  else
                  {
                       document.getElementById('link_left').innerHTML = "<a href='#' onclick='loadinghis();yearleft();'><img src='img/his_left.png' border='0'></a>";
                  }
                  
                  if(maximum == atm)
                  {
                       document.getElementById('link_right').innerHTML = "<img src='img/his_right_lo.png' border='0'>";
                  }
                  else
                  {
                       document.getElementById('link_right').innerHTML = "<a href='#' onclick='loadinghis();yearright();'><img src='img/his_right.png' border='0'></a>";
                  }
                  
                  
                  
            }
            
            function yearleft()
            {
                 var ajax_atm = document.getElementById('ajax_atm').value;
                 var atm_neu = ajax_atm - 1;
                 
                 settopic(atm_neu);
                 
                 
                 
                 
            }
            
            function yearright()
            {
                 var ajax_atm = document.getElementById('ajax_atm').value;
                 
                 var atm_neu = parseInt(ajax_atm)+1 ;
                 
                 settopic(atm_neu);
            }
            
            function settopic(show)
            
            {            
                 showhistopic(show);
                 settmpfield(show);
                 showhiscon(show);      
                 checkarrows();
                 
            }
            
            
            function loadinghis()
            {
                document.getElementById('hiscon').innerHTML = "<br><center><img src='img/loader.gif'></center><br>&#160;";
             }