function tablas() {
  alumnes.sort();
  for(i=0;i<alumnes.length;i++){
    if (i%2==0) color = "class='par'";
    else color= "class='impar'";
    document.write('<tr '+color+'><td>');
    document.write('<a href="'+alumnes[i][1]+'" target="_blank">'+alumnes[i][0]+"</a>");
    document.write('</td>');
	document.write('<td>'+alumnes[i][2]+'</td>');
    document.write('<td>'+alumnes[i][3]+'</td></tr>');
  }
}
/*function tablas() {
  alumnes.sort();
  for(i=0;i<alumnes.length;i++){
    if (i%2==0) color = "class='par'";
    else color= "class='impar'";
    document.write('<tr><td '+color+'>');
    document.write('<a href="'+alumnes[i][1]+'" target="_blank">'+alumnes[i][0]+"</a>");
    document.write('</td>');
	document.write('<td '+color+'>'+alumnes[i][2]+'</td>');
    document.write('<td '+color+'>'+alumnes[i][3]+'</td>');
  }
}*/