jQuery slider problems, plus problems with IE

jQuery slider problems, plus problems with IE

Hey everyone. I'm making a portfolio and it works fine in Firefox however IE is causing me some massive problems. Visit the website here

This is the source code for each of the pages:

index.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Caitlin-Helbig.com</title>

<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="slider.js"></script>
<link href="sheet.css" rel="stylesheet" type="text/css" />

</head>

<body>
<div id="portfolio">
Portfolio here
</div>
<div id="skills">
Skills here
</div>
<div id="education">
Education here
</div>
<div id="workhistory">
Work History here
</div>
<div id="contact">
Contact here
</div>


<div id="links">
    <div class="box1">
        <div class="box1">
            <div class="box1">
                <div class="slide"><a href="#" class="button1">Portfolio</a></div>
         </div>
            <div class="box2">
             <div class="slide"><a href="#" class="button2">Skills</a></div>
            </div>
      </div>
        <div class="box2">
            <div class="box1">
                <div class="slide"><a href="#" class="button3">Education</a></div>
         </div>
            <div class="box2">
             <div class="slide"><a href="#" class="button4">Work History</a></div>
            </div>
      </div>
    </div>
    <div class="box2">
        <div class="slide"><a href="#" class="button5">Contact</a></div>
    </div>
</div>

<div id="space1">&nbsp;</div>
<div id="title"><img src="images/title.png" alt="title" id="titleimage"/></div>
<div id="contents">Contents here</div>
</body>
</html>


sheet.css
body {
    background: url("images/background.jpg") repeat-x #dbdbdb;
   margin-top: 0px;
   margin-left: auto;
   margin-right: auto;
   font-family: tahoma, arial, sans-serif;
   font-size: 12px;
   width: 825px;
}
img#titleimage {
    position: absolute;
   bottom: 0px;
   right: 10px;
}
#links {
    width: 825px;
   height: 55px;
}
#space1 {
    width: 800px;
   height: 120px;
}
#title {
    float: left;
   width: 398px;
   height: 195px;
   text-align: right;
   padding-right: 2px;
   position: relative;
}
#contents {
    float: right;
   width: 340px;
   height: 195px;
   padding-top: 4px;
   padding-right: 60px;
}
.box1 {
    float: left;
}
.box2 {
    float: right;
}
a:focus {
   outline: none;
}
#portfolio, #skills, #education, #workhistory, #contact {
   background: #ffffff;
   height: 450px;
   display: none;
   padding-left: 10px;
   padding-right: 10px;
}
.slide {
   margin: 0;
   padding: 0;
   border-top: solid 8px #000000;
   background: url(images/link.png) no-repeat center top;
}
.button1,.button2,.button3,.button4,.button5 {
   text-align: center;
   width: 155px;
   height: 46px;
   padding: 10px 10px 0 0;
   margin: 0 auto;
   display: block;
   font-family: Tahoma, Arial, sans-serif;
   font-weight: bold;
   color: #ffffff;
   text-decoration: none;
}


slider.js
$(document).ready(function(){

   $(".button1").click(function(){
      $("#portfolio").slideToggle("slow");
      $(this).toggleClass("active"); return false;
   });
   
   
});
$(document).ready(function(){

   $(".button2").click(function(){
      $("#skills").slideToggle("slow");
      $(this).toggleClass("active"); return false;
   });
   
   
});
$(document).ready(function(){

   $(".button3").click(function(){
      $("#education").slideToggle("slow");
      $(this).toggleClass("active"); return false;
   });
   
   
});
$(document).ready(function(){

   $(".button4").click(function(){
      $("#workhistory").slideToggle("slow");
      $(this).toggleClass("active"); return false;
   });
   
   
});
$(document).ready(function(){

   $(".button5").click(function(){
      $("#contact").slideToggle("slow");
      $(this).toggleClass("active"); return false;
   });
   
   
});


Does anyone have any ideas on how to fix the IE problem?

The other thing I want to do is I want my slider to cover the content on the main page when it is clicked, rather than push it down, and I don't want the user to be able to click more than one link at a time like they currently can now. Can someone help me achieve this?

Thanks!!!