void checkuser(String username){

  CalcLock = true;
  Curstatus = "accessing last.fm...this may take a while...";



  //String getthisuser = convertencoding(username);
  try { 
    xmlcharts = new XMLElement(this, "http://ws.audioscrobbler.com/1.0/user/"+username+"/topartists.xml");
  } 
  catch (Exception e) {
    Curstatus = "User "+username+" not Found or Connection Lost";
  }

  if (Curstatus.equals("User not Found or Connection Lost") == false){
    Curstatus = "User Found";
    activeuser = username;
    remove(textField);
    TFbutton.active = false;
  }

  tree.active = true;
  field.active = true;
  time.active = true;
  CalcLock = false;
}

void chartsloader(String username, String period){


  CalcLock = true;
  personalcharts = new CL_charts[artistnum];
  Curstatus = "Loading "+period+" Charts for "+username;
  try { 
    xmlcharts = new XMLElement(this, "http://ws.audioscrobbler.com/1.0/user/"+username+"/topartists.xml?type="+period);
  } 
  catch (Exception e) {
    Curstatus = "Connection Lost";
  }


  statusfeld.draw();
  int numattribute = xmlcharts.getChildCount();



  for (int i = 0; i < numattribute; i++) {
    personalcharts[i] = new CL_charts();
    XMLElement artistdata = xmlcharts.getChild(i);
    XMLElement kid = artistdata.getChild("name");
    personalcharts[i].artist = kid.getContent();
    kid = artistdata.getChild("playcount"); 
    personalcharts[i].playcount = kid.getContent(); 

  }

  artistnum = numattribute;
  //println(artistnum);
  if (doOnce == false){
    //doOnce == true
    loader.stop();
  }
  doOnce  = false;

  //reset arrays fuer neustart dingenskirchen
  array1 = new String[0];  
  array1b = new String[0];
  array2 = new String[0];
  array2b = new String[0];
  array3 = new String[0];
  array3b = new String[0];
  array4 = new String[0];
  array4b = new String[0];
  array5 = new String[0]; 
  array5b = new String[0];
  array6 = new String[0]; 
  array6b = new String[0];

  array1tag = "";
  array2tag = "";
  array3tag = "";
  array4tag = "";
  array5tag = "";
  //ende reset array

  loader = new CL_artisttagloader(this);  

  loader.start();


  //} 
  //else {

  //CalcLock = false;

  //}
}


void sortbytag(int numartists){



  String [] taglist = new String [numartists];
  int [] tagcount = new int [numartists];

  String toptag1[] = {
    "0","0"                            };
  String toptag2[] = {
    "0","0"                            };
  String toptag3[] = {
    "0","0"                            };
  String toptag4[] = {
    "0","0"                            };
  String misctags[] = {
  };



  boolean addmisc = true;

  //einmal bitte ueberall 1 setzen
  for (int i=0; i < numartists; i++){
    taglist[i] = personalcharts[i].tag;
    tagcount[i] = 1; 
  }

  //durchzaehlen was wie oft da ist  
  for (int i=0; i < numartists; i++){
    for (int n=i+1; n < numartists; n++){
      if (taglist[i].equals(taglist[n]) == true){
        tagcount[i] = tagcount[i]+1;
        tagcount[n] = tagcount[n]+1;

      }
    }
  } 

  //suche die 4 tags mit der hoechsten anzahl
  for  (int i=0; i < numartists; i++){
    if ((taglist[i].equals(toptag1[1]) == false) && (taglist[i].equals(toptag2[1]) == false)  && (taglist[i].equals(toptag3[1]) == false)  && (taglist[i].equals(toptag4[1]) == false)  ) {
      if (tagcount[i] > int(toptag1[0])){
        arraycopy(toptag3, toptag4);
        arraycopy(toptag2, toptag3);
        arraycopy(toptag1, toptag2);
        toptag1[0] = str(tagcount[i]);
        toptag1[1] = taglist[i];
      } 
      else if ((tagcount[i] > int(toptag2[0])) && (tagcount[i] < int(toptag1[0]))){

        arraycopy(toptag3, toptag4);
        arraycopy(toptag2, toptag3);
        toptag2[0] = str(tagcount[i]);
        toptag2[1] = taglist[i];
      } 
      else if ((tagcount[i] > int(toptag3[0])) && (tagcount[i] < int(toptag2[0]))){
        arraycopy(toptag3, toptag4);
        toptag3[0] = str(tagcount[i]);
        toptag3[1] = taglist[i];
      } 
      else if ((tagcount[i] > int(toptag4[0])) && (tagcount[i] < int(toptag3[0]))){
        toptag4[0] = str(tagcount[i]);
        toptag4[1] = taglist[i];
      } 
    }
  }

  //restliche tags in misctags schmeissen
  for  (int i=0; i < numartists; i++){
    addmisc = true;
    if ((taglist[i].equals(toptag1[1]) == false) && (taglist[i].equals(toptag2[1]) == false)  && (taglist[i].equals(toptag3[1]) == false)  && (taglist[i].equals(toptag4[1]) == false)) {
      for (int n=0; n < misctags.length; n++){
        if (misctags[n].equals(taglist[i]) == true)
          addmisc = false;

      }
      if (addmisc == true){
        misctags = append(misctags, taglist[i]);
        //println("misctags: "+taglist[i]);
      }
    }
  }


  //println(toptag1[0]+"  "+toptag1[1]);
  //println(toptag2[0]+"  "+toptag2[1]);
  //println(toptag3[0]+"  "+toptag3[1]);
  //println(toptag4[0]+"  "+toptag4[1]);

  array1tag = toptag1[1];
  array2tag = toptag2[1];
  array3tag = toptag3[1];
  array4tag = toptag4[1];
  array5tag = "miscellaneous";

  String do1 = toptag1[1];
  String do2 = toptag2[1];
  String do3 = toptag3[1];
  String do4 = toptag4[1];
  boolean pendulum1 = false;
  boolean pendulum2 = false;
  boolean pendulum3 = false;
  boolean pendulum4 = false;
  boolean pendulum5 = false;  
  boolean pendulum6 = false; 

  //durchgehn und alle artistnamen eines genres in die 2 dafur vorgesehenen arrays rotzen
  for (int i=0; i< numartists; i++){
    if (personalcharts[i].tag.equals(do1)){
      if (pendulum1 == false){
        array1 = append(array1, personalcharts[i].artist);
        pendulum1 = true;
      } 
      else {
        array1b = append(array1b, personalcharts[i].artist);
        pendulum1 = false;
      }
    } 
    else
      if (personalcharts[i].tag.equals(do2)){
        if (pendulum2 == false){
          array2 = append(array2, personalcharts[i].artist);
          pendulum2 = true;
        } 
        else {
          array2b = append(array2b, personalcharts[i].artist);
          pendulum2 = false;
        }
      }
      else
        if (personalcharts[i].tag.equals(do3)){
          if (pendulum3 == false){
            array3 = append(array3, personalcharts[i].artist);
            pendulum3 = true;
          } 
          else {
            array3b = append(array3b, personalcharts[i].artist);
            pendulum3 = false;
          }
        }
        else
          if (personalcharts[i].tag.equals(do4)){
            if (pendulum4 == false){
              array4 = append(array4, personalcharts[i].artist);
              pendulum4 = true;
            } 
            else {
              array4b = append(array4b, personalcharts[i].artist);
              pendulum4 = false;
            }
          }
          else if ( (personalcharts[i].tag.equals(do1) == false) && (personalcharts[i].tag.equals(do2) == false) && (personalcharts[i].tag.equals(do3) == false) && (personalcharts[i].tag.equals(do4) == false) )
          {
            if ((pendulum5 == false) && (pendulum6 == false)){
              array5 = append(array5, personalcharts[i].artist);
              pendulum6 = true;
            } 
            else if ((pendulum5 == false) && (pendulum6 == true)){
              array6 = append(array6, personalcharts[i].artist);
              pendulum5 = true;
              //pendulum6 = false;
            } 
            else if ((pendulum5 == true) && (pendulum6 == true)){
              array5b = append(array5b, personalcharts[i].artist);
              pendulum6 = false;

            }
            else if ((pendulum5 == true) && (pendulum6 == false)){
              array6b = append(array6b, personalcharts[i].artist);
              pendulum5 = false;

            }
          }
  }


  CalcLock = false;
  ChartsLoaded = true;
  Curstatus = "Loading and Sorting Done";
  // loader.stop();



}

class CL_charts {
  String artist, playcount, tag;  
}