if ($author=="") { echo "Click on the author name to show details.";}
	if ($author=="poster") {
		echo '| Poster Session | 
';
	}
	
	if ($author<>"") {
		echo "";
		echo "| Author";
		echo " | Title";
		echo " | Co-author(s)";
		echo " | 
";
	}
		
	$fh=fopen("./files/prednasejici.txt","r");
  $obsah = fread($fh,filesize("./files/prednasejici.txt"));
  $radky=explode("\n",$obsah);
  
	$typ="";
  
  foreach($radky as $radek) { 
		 
		    if (strlen($radek)<>0) {
		      $polozky=explode("	",$radek);
		      	
		      	// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
		      	// vsechny polozky
		      	// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
		      	
		      	if ($author=="all") {
		      	
			      if ($typ=="" and trim($polozky[7])=="plenary") {
			      	echo '| Plenary Speakers | 
';
			      	$typ="plenary";
						}
			      
			      if ($typ=="plenary" and trim($polozky[7])=="poster") {
			      	echo '| Poster Session | 
';
			      	$typ="poster";
						}
						
						echo "";
						
						// prijmeni + jmeno
						echo "| ";
						pis_polozku($polozky[0]);
			      echo " ";
			      pis_polozku($polozky[1]);
			      echo " ";
						     
			      echo "";
			      
			      // instituce
			      pis_polozku($polozky[2]);
			      echo "
 ";
			      
			      // mesto
			      pis_polozku($polozky[3]);
			      
			      echo "
 ";
			      
			      // stat
			      pis_polozku($polozky[4]);
			      
						echo "
 | ";
			      if (trim($polozky[7])=="oral") {echo '';}
			      if (trim($polozky[7])=="plenary") {echo '';}
			      if (trim($polozky[7])=="poster") {echo '';}
			      
			      // title
			      pis_polozku($polozky[5]);
			      
			      echo "";
			      echo "";
			      
						echo " | ";
						
						// spoluautori
			      pis_polozku($polozky[6]);
			      
			      echo "";
			            
			      echo " | 
";
			      // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
			      // jenom autor
			      // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
						} elseif ($author=="poster") {
								if (trim($polozky[7])=="poster") {
				      
						      echo "";
				
									// prijmeni + jmeno
									echo "| ";
									pis_polozku($polozky[0]);
						      echo " ";
						      pis_polozku($polozky[1]);
						      echo " ";
									     
						      echo "";
						      
						      // instituce
						      pis_polozku($polozky[2]);
						      echo "
 ";
						      
						      // mesto
						      pis_polozku($polozky[3]);
						      
						      echo "
 ";
						      
						      // stat
						      pis_polozku($polozky[4]);
						      
									echo "
 | ";
						      if (trim($polozky[7])=="oral") {echo '';}
						      if (trim($polozky[7])=="plenary") {echo '';}
						      if (trim($polozky[7])=="poster") {echo '';}
						      
						      // title
						      pis_polozku($polozky[5]);
						      
						      echo "";
						      echo "";
						      
									echo " | ";
									
									// spoluautori
						      pis_polozku($polozky[6]);
						      
						      echo "";
						            
						      echo " | 
";
					      }
						}
						else 	{
			      
				      if ($polozky[0]==$author and trim($polozky[7])<>"poster") {
				      
					      echo "";
			
								// prijmeni + jmeno
								echo "| ";
								pis_polozku($polozky[0]);
					      echo " ";
					      pis_polozku($polozky[1]);
					      echo " ";
								     
					      echo "";
					      
					      // instituce
					      pis_polozku($polozky[2]);
					      echo "
 ";
					      
					      // mesto
					      pis_polozku($polozky[3]);
					      
					      echo "
 ";
					      
					      // stat
					      pis_polozku($polozky[4]);
					      
								echo "
 | ";
					      if (trim($polozky[7])=="oral") {echo '';}
					      if (trim($polozky[7])=="plenary") {echo '';}
					      if (trim($polozky[7])=="poster") {echo '';}
					      
					      // title
					      pis_polozku($polozky[5]);
					      
					      echo "";
					      echo "";
					      
								echo " | ";
								
								// spoluautori
					      pis_polozku($polozky[6]);
					      
					      echo "";
					            
					      echo " | 
";
					      }
							}
			    	// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
			    
    } 
  }
  
  function pis_polozku($polozka) {
  	if ($polozka<>"") {
			$vysledek = $polozka;
		} else { $vysledek = " ";}
		
		if ($vysledek[0]=='"') {
			echo substr($vysledek,1,-1);
		} else {
			echo $vysledek;
		}
							
	}
	
?>