Problem mit anzeigen einer Tabelle

[firestone]

Hi!

Was macht denn show()?

Hier der Code

function show (member) {
        if (document.getElementById) {
            if (document.getElementById(member).style.display == "block") {
                document.getElementById(member).style.display = "none";
            } else {
                document.getElementById(member).style.display = "block";
            }
        }
    }

Ok wenn ich die Funktion show so abänder funktioniert es  
~~~html
  
 function show (member) {  
        if (document.getElementById) {  
            if (document.getElementById(member).style.display == "") {  
                document.getElementById(member).style.display = "none";  
            } else {  
                document.getElementById(member).style.display = "";  
            }  
        }  
    }  

Aber warum wer kann mir das erklären ?