Question

I can’t hide my div using some i.e. explode effect in jquery ui, It always slides down (or something like that), whatever effect I put as parameter in my code.

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script src="http://jquery-ui.googlecode.com/svn/tags/1.8rc3/ui/jquery-ui.js"></script>
$(document).ready(function(){

$('.rozwin').click(function(){
    $('#main').hide('explode');
    $('#main').show('explode');  
});  

<a href="" class="rozwin>hide and show</a>

<div id='main'>...</div>

Answer 1

There’s quite a bit wrong with this code.

This script src is missing the http:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>

<script src="http://jquery-ui.googlecode.com/svn/tags/1.8rc3/ui/jquery-ui.js"></script>

You do not start your javascript with a <script type="text/javascript">, so all of your jQuery is interpreted as plain text.

$(document).ready(function(){

You are not preventing the default action of the click.

$('.rozwin').click(function(){
    $('#main').hide('explode');
    $('#main').show('explode');  
});  

You do not enclose your .ready()…

Your anchor tag’s class has no closing quote.

<a href="" class="rozwin>hide and show</a>

<div id='main'>...</div>

Here’s the snippet with all the fixes it needs.

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript" src="http://jquery-ui.googlecode.com/svn/tags/1.8rc3/ui/jquery-ui.js"></script>
<script type="text/javascript">
    $(document).ready(function(){
        $('.rozwin').click(function(e){
            e.preventDefault();
            $('#main').hide('explode');
            $('#main').show('explode');  
        });  
    });
</script>

<a href="" class="rozwin">hide and show</a>
<div id='main'>...</div>

Keep in mind that your show events won’t work as expected because they’re triggering too quickly, since you’re not using it in the callback of .hide().

http://jsfiddle.net/zq2Hz/