[jQuery] Need help with animations in IE

[jQuery] Need help with animations in IE


Hi, this is one of my firsts experiences with jQuery and I have a
little problems already.
The problem explanation is that I want to apply an effect to a css
layer (and it is applied) that when you click on a special div, it
moves some layers. It works perfectly with Firefox, but not in IE...
I leave here the css code and the jQuery script...
////////////////////////////// jQuery
<script type="text/javascript">
$(document).ready(function(){
    var selected_opt = 0;
    var speed = 300;
    $("#contentbox4").animate({
     opacity: 0
});
$("#footer_lt").click(function () {
     $("#contentbox1").animate({
opacity: 0,
left: "-500px"
}, speed );
     $("#contentbox2").animate({
left: "0px"
}, speed );
     $("#contentbox3").animate({
left: "311px",
}, speed );
     $("#contentbox4").animate({
     opacity: 100,
right: "0px"
}, speed );
     selected_opt = 1;
});
    $("#footer_rt").click(function () {
     $("#contentbox1").animate({
opacity: 100,
left: "0px"
}, speed );
     $("#contentbox2").animate({
left: "311px"
}, speed );
     $("#contentbox3").animate({
         left: "622px"
}, speed );
     $("#contentbox4").animate({
     opacity: 0,
right: "-500px"
}, speed );
});
});
</script>
////////////////////////////// CSS
#contentbox1 {
    position:absolute;
    left:0px;
    top:80px;
    width:278px;
    height:439px;
}
#contentbox2 {
    position:absolute;
    left: 311px; /* 336px; <= Para el master950px */
    top:80px;
    width:278px;
    height:439px;
}
#contentbox3 {
    position:absolute;
    right:0px;
    top:80px;
    width:278px;
    height:439px;
}
#contentbox4 {
    position:absolute;
    right:-500px;
    top:80px;
    width:278px;
    height:439px;
}
You dont have to rewrite the code if you don't want (I don't want to
annoy anyone) but if you can explain me the error... ^^
Thanks anyway!