[jQuery] Slidedown menu works in FF and IE but not Chrome, Safari & Opera

[jQuery] Slidedown menu works in FF and IE but not Chrome, Safari & Opera


I created a drop down menu (i think i followed a tutorial but it was
so long ago i can't remember) which works 100% perfectly in firefox
and internet explorer but not opera, safari and chrome. I really want
to get it working in all of them though. Perhaps you might know what
the problem will be.
The Jquery Code:
    var $j= jQuery.noConflict();
    $j(document).ready(function(){
    $j(".message_body").hide();
    //toggle message_body
    $j(".message_head").click(function(){
        $j(this).next(".message_body").slideToggle(500)
        return false;
    });
    });
The Code for the dropdown menu:
<div id="options">
    <div class="holder">
<p class="message_head">Prices
<div class="message_body">

Our prices are freakin' awesome!


</div>
</div>
<div class="holder">
<p class="message_head" id="testbg">Testimonials
<div class="message_body">

I love them, they're brilliant!


<p class="quoter">- Business
</div>
</div>
<div class="holder">
<p class="message_head" id="quotebg">Get a Quote
<div class="message_body">
<form name="quote" method="post" action="quoter.php">


Name:<br />
<input type="text" name="txtName" /><br />
Email:<br />
<input type="text" name="txtEmail" /><br />
Details:<br />
<textarea name="txtDetails"></textarea><br />
<input type="submit" value="Submit" class="button" />









</form>
</div>
</div>
</div>
Hope you can help!