generating links from DB

[tha_Gsheep]

Hey there I'm trying to generate a listing of articles from my DB that when clicked will add the db contents
for that article to a seperate area that contains themain content of the page.

As the page loads it checks for a variable in this code:

function getVars(){
    if(isset($_GET['articleID'])){
        $this->articleID = $_GET['articleID'];
        $this->readArticle();
    }else{
        $this->findLinkedArticle();
    }
} 

,which checks for an article.
A little further on in the code I generate the links for the articles like so:

    $get_rants = mysql_query("SELECT * FROM tblarticles LIMIT 4");
                        while ($array = mysql_fetch_array($get_rants))
                        {
                          $mainContent .=  "<li>";
                          if ($array[flag]<>"")
                            {$mainContent .= "<img src=/art/$array[flag].gif width=17 height=13 align=middle> ";}    
                          $mainContent .=  "<a href=\"index.php?[articleID]=$array[id]\" title=\"'$array[title]' posted $array[date]\">$array[title]</a>by ";                        
                          $mainContent .=  "<a href=\"$array[author]\" title=\"$array[author] profile>>\" class=\"author\">$array[author]</a></li>";
                        }
                          $mainContent .=  "</ul>";    
    $mainContent .= "</ul></div>"; 

which gives me a nice big list of the entries from my DB and their articleID's
but when clicked it just dosen't seem to add the article contents. Can anyone see where I'm going wrong.
It used to work! I just don't know what I've done to it. To see the problem in action go here