Changing an image when clicking on a link

[cerberus478]

Hi

 

I'm trying to change an image when a certain link is clicked. The image is a logo of a company and the links that will be clicked is english, arabic, and Chinese.

 

So if someone clicks on Chinese then the logo changes to the Chinese version of the normal logo.

 

 

 

Here is my html

<?php
$langArabic='';
    $langChinese='';
    $langSpanish='';
    $langEng='';

    $linkArabic=getSEOLink($page_id);
    $linkChinese=getSEOLink($page_id);
    $linkSpanish=getSEOLink($page_id);
    $linkEng=getSEOLink($page_id);

    $queryLink = mysql_query("SELECT * FROM $_SEO_TABLE WHERE `id_page`='".$page_id."'");
    if(mysql_num_rows($queryLink) > 0){
        $resultLink = mysql_fetch_object($queryLink);
        if($resultLink->url != ''){
            $linkEng = $_HTTP_ADDRESS."".$resultLink->url;
            if($page_id == 1 || $page_id == '1'){
                $linkEng = $_HTTP_ADDRESS;
            }
        }
        if($resultLink->url_arabic != ''){
            $linkArabic = $_HTTP_ADDRESS."".$resultLink->url_arabic;
        }
        if($resultLink->url_chinese != ''){
            $linkChinese = $_HTTP_ADDRESS."".$resultLink->url_chinese;
        }
        if($resultLink->url_spanish != ''){
            $linkSpanish = $_HTTP_ADDRESS."".$resultLink->url_spanish;
        }
    }

    switch (urlExtension()) {
        case 'html':
            $langClass = '';
            $langEng='langActive';
            $langTag='en';
            break;
        case 'ar':
            if($page->title_arabic == ''){
                $langClass = '_arabic'; 
            }else{
                $langClass = '_arabic';
            }
            $langArabic='langActive';
            $langTag='ar';
            break;
        case 'es':
            $langClass = '';
            $langSpanish='langActive';
            $langTag='es';
            break;
        case 'cn':
            $langClass = '';
            $langChinese='langActive';
            $langTag='cn';
            break;
        default:
            $langClass = '';
            $langEng='langActive';
            $langTag='en';
    }
?>

<a class="main-logo<?php echo $langClass;?>" href="javascript:void(0);"><img src="<?php echo $_HTTP_ADDRESS;?>images/logo-letters.png" /></a>


<div class="language-selection-wrapper<?php echo $langClass;?> overlay-bg<?php echo $langClass;?> border-bottom-white<?php echo $langClass;?> padding-level-one<?php echo $langClass;?>">
                <div class="language-inner-wrapper<?php echo $langClass;?>">
                    <a class="<?php echo $langEng;?>" href="<?php echo $linkEng;?>">English</a><span>|</span>
                    <a class="<?php echo $langArabic;?>" href="<?php echo $linkArabic;?>">العربيّة</a><span>|</span>
                    <a class="<?php echo $langSpanish;?>" href="<?php echo $linkSpanish;?>">Español</a><span>|</span>
                    <a class="<?php echo $langChinese;?>" href="<?php echo $linkChinese;?>">中文</a>
                    <div class="clearboth"></div>
                </div>