Hi I'm not English so I'll do some mistakes ^^''
I'm having trouble with IE6. When i visit my web site it cuts off the ending side of the page. Differently, on other browsers, it works fine.

I think it is a problem with overflow function, but I can't fix it

Here there is the code of the page:

Code:
<!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>Site Name</title>
<link rel="stylesheet" href="css/style.css" type="text/css" media="screen" />

<!--[if lte IE 6]>
<style>


#imageMenu ul li.button1 a {
	background: url(images/button1.jpg) repeat scroll 0%;
}
#imageMenu ul li.button2 a {
	background: url(images/button2.jpg) repeat scroll 0%;
}
#imageMenu ul li.button3 a {
	background: url(images/button3.jpg) repeat scroll 0%;
}
#imageMenu ul li.button4 a {
	background: url(images/button4.jpg) repeat scroll 0%;
}
#imageMenu ul li.button5 a {
	background: url(images/button5.jpg) repeat scroll 0%;
}
#imageMenu ul li.button6 a {
	background: url(images/button6.jpg) repeat scroll 0%;
}
#imageMenu ul li.button7 a {
	background: url(images/button7.jpg) repeat scroll 0%;
}
#imageMenu ul li.button8 a {
	background: url(images/button8.jpg) repeat scroll 0%;
}

#Container {
margin-left: -378px;
}

img, div {behavior: url(iepngfix.php);}
//img, div {behavior: url(iepngfix.htc);}
</style>
<![endif]-->


</head>

<body>
<div id="background_header"></div>
<div id="Logo"></div>
<div id="Background_menu"></div>

<div id="Menu">
    <div id="imageMenu">
                <ul>
                    <li class="button1"><a href="#">Button1</a></li>
                    <li class="button2"><a href="#">Button2</a></li>
                    <li class="button3"><a href="#">Button3</a></li>
                    <li class="button4"><a href="#">Button4</a></li>
                    <li class="button5"><a href="#">Button5</a></li>
                    <li class="button6"><a href="#">Button6</a></li>
                    <li class="button7"><a href="#">Button7</a></li>
                    <li class="button8"><a href="#">Button8</a></li>
                </ul>
                </div>
            
            <script type="text/javascript">
                
                window.addEvent('domready', function(){
                    var myMenu = new ImageMenu($$('#imageMenu a'),{openWidth:334, border:1, onOpen:function(e,i){alert(e);}});
                });
            </script>

</div>

<div id="Container">
	<div id="Container_top"></div>
    
    <div id="Text">
    <div style="background:url(images/background_text_top_bottom.jpg); width:507px; height:1px; overflow:hidden;"></div>
    	<div id="Content">
        	<div id="Content_Text">
            <center><img src="images/image.jpg" width="380" height="264" style="border: 1px black solid;" alt="Envato Web Site" /></center><div style="font-size:16px; font-family:Verdana, Arial, Helvetica, sans-serif, Calibri; font-weight: bold; text-align:center; margin-top:4px; "><i>Lorem ipsum dolor sit amet.</i></div><br />
            Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam vitae dolor eget nulla vestibulum tempor ac in ante. Nullam pellentesque orci laoreet mauris elementum vitae ultrices sapien aliquam. Nam non erat libero, non interdum nunc. Vivamus accumsan lorem ac leo imperdiet facilisis. Proin et aliquet nibh. Etiam sodales sodales libero, faucibus molestie arcu elementum ac. Morbi molestie turpis quis libero condimentum laoreet. Donec placerat ullamcorper vehicula. Aliquam id volutpat urna. Etiam aliquet, mi vel faucibus commodo, ante metus accumsan ligula, ac scelerisque urna velit eget justo. 
            
            <div id="Bar1" class="Bar"></div>
         
                 <br /><img src="images/icon.png" width="53" height="51" style="float:left; margin-right:4px;" alt="" /><div style="font-size:16px; font-family:Verdana, Arial, Helvetica, sans-serif, Calibri; text-align:left; font-weight:bold; "><font color="#fb2300"><i>Lorem ipsum dolor sit amet</i></font><i>, consectetur adipiscing elit. Donec ante mi, tincidunt vel consectetur vitae, posuere eu augue.</i></div><br />
            Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam vitae dolor eget nulla vestibulum tempor ac in ante. Nullam pellentesque orci laoreet mauris elementum vitae ultrices sapien aliquam. Nam non erat libero, non interdum nunc. Vivamus accumsan lorem ac leo imperdiet facilisis. Proin et aliquet nibh. Etiam sodales sodales libero, faucibus molestie arcu elementum ac. Morbi molestie turpis quis libero condimentum laoreet. Donec placerat ullamcorper vehicula. Aliquam id volutpat urna. Etiam aliquet, mi vel faucibus commodo, ante metus accumsan ligula, ac scelerisque urna velit eget justo. 
     

            </div>
        </div>   
    <div style="background:url(images/background_text_top_bottom.jpg); width:507px; height:1px; overflow:hidden;"></div>
    </div>
    
    
   
    <div id="Right">
    
    	        <div id="Sign_in_top" style="background:url(images/sign_in.jpg)" class="Right_top"></div>
        <div id="Sign_in_background" class="Right_background">
        	<div id="Sign_in_text" class="Right_text">
            <form id="sign_in" name="sign_in" method="post" action="">
               <table width="100%" border="0">
                 <tr>
                   <td>
                     <label>
                       <input onclick="this.select();" name="username" type="text" id="username" style="width:100%; border: 1px solid #999999; color:#666666; font-family: Calibri,Verdana, Arial, Helvetica, sans-serif; font-size:12px;" value="Username" />
                     </label>
                   </td>
                 </tr>
                 <tr>
                   <td><input onclick="this.select();" name="password" type="password" id="password" style="width:100%; border: 1px solid #999999; color:#666666; font-family: Calibri,Verdana, Arial, Helvetica, sans-serif; font-size:12px;" value="Password" /></td>
                 </tr>
                 <tr>
                   <td><div style="text-align:right;"><label>
                     <input type="submit" name="button" id="button" value="Sign in" style="border: 1px solid #999999; color:#666666; font-family: Calibri,Verdana, Arial, Helvetica, sans-serif; font-size:12px;" />
                   </label></div></td>
                 </tr>
               </table>
                </form>
        	</div>
        </div>
        <div id="Sign_in_bottom" class="Right_bottom"></div>
        
        <div style="height:10px;"></div>
        
             
        
    	<div id="Latest_images_top" style="background:url(images/latest_images.jpg)" class="Right_top"></div>
        <div id="Latest_images_background" class="Right_background">
        	<div id="Latest_images_text" class="Right_text">
            <center><a href="images/gallery6.jpg" rel="roebox[galleria]"><img src="images/gallery6_thumb.jpg" width="231" height="75" border="0" alt="Lates Images" /></a></center><br />
            <center><a href="images/gallery5.jpg" rel="roebox[galleria]"><img src="images/gallery5_thumb.jpg" width="231" height="75" border="0" alt="Lates Images" /></a></center><br />
            <div style="text-align:right"><a href="#">Other images <img src="images/arrow.png" width="5" height="6" alt="See other images" border="0" /></a></div>
          </div>
        </div>
        <div id="Latest_images_bottom" class="Right_bottom"></div>

        <div style="height:10px;"></div>
        
        
    	<div id="Latest_news_top" style="background:url(images/latest_news.jpg)" class="Right_top"></div>
        <div id="Latest_news_background" class="Right_background">
        	<div id="Latest_news_text" class="Right_text" style="overflow:hidden;">
            <ul class="news">
            <li><a href="#">Lorem ipsum dolor sit amet</a><br />
            JUNE 27, 2009<div style="height:15px;"></div></li>
            <li><a href="#">Fusce non metus eget metus</a><br />
            JUNE 17, 2009<div style="height:15px;"></div></li>
            <li><a href="#">Nullam quis nisi lectus id</a><br />
            MAY 29, 2009<div style="height:15px;"></div></li>
            <li><a href="#">Mauris id neque vel nullam</a><br />
            MARCH 15, 2009</li>
            </ul>
          </div>
        </div>
        <div id="Latest_news_bottom" class="Right_bottom"></div>
        
              
        
    </div>
    
    <div id="Footer">
    <div id="Footer_Top"></div>
    <div id="Footer_Text">Site Name © 2009 | <a href="#">Privacy Policy</a></div>
    <div id="Footer_Bottom"></div>
  </div>
    
    <div id="Container_bottom"></div>
 
    
    
</div>

</body>
</html>
Css:

Code:
html, body {
margin-top: 0px;
margin-left: 0px;
color: #000000;
font-family: Calibri,Verdana, Arial, Helvetica, sans-serif;
font-size:12px;
text-align: justify;
}
body {
background: #000000;
}
ul.news li{
list-style-image:url(../images/arrow.png);
}
a {
color: #ff7e00;
text-decoration:underline;
}
a:hover {
color: #000000;
}
#background_header {
position: absolute;
background: url(../images/pattern.jpg) repeat-x;
height: 283px;
width: 100%;
z-index: 1;
left: 0px;
}
#Logo {
position:absolute;
width: 358px;
height: 59px;
background: url(../images/logo.png) no-repeat;
z-index: 2;
left: 50%;
top: 33px;
margin-left: -179px;
}
#Background_menu {
position: absolute;
background: url(../images/background_menu.png) no-repeat;
width: 765px;
height: 293px;
top:127px;
left: 50%;
margin-left: -382px;
z-index: 3;
}
#Container_top {
position: relative;
z-index:5;
background:url(../images/background_container_top.jpg) no-repeat;
width:765px;
overflow: hidden;
height:10px;
}
#Container {
position: relative;
width:765px;
left: 50%;
margin-left: -379px;
background:url(../images/background_container_pattern.jpg) repeat-y;
z-index:4;
top: 348px;
}
#Container_bottom {
position: relative;
z-index:5;
background:url(../images/background_container_bottom.jpg) no-repeat;
width:765px;
height:10px;
overflow:hidden;
}
#Text {
position: relative;
z-index: 5;
width:507px;
left: 6px;
float:left;
}
#Content {
position: relative;
width:507px;
z-index:6;
background:url(../images/background_text_pattern.jpg) repeat-y;
float:left;
}
#Content_Text {
position: relative;
z-index: 7;
left: 4px;
width: 499px;
float:left;
margin-top: 10px;
margin-bottom: 10px;
}
#Right {
position: relative;
z-index:5;
width: 243px;
left:10px;
float:left;
}
.Right_top {
position: relative;
z-index:6;
width:241px;
height:44px;
}
.Right_bottom {
position: relative;
background:url(../images/background_right_bottom.jpg);
z-index:6;
width:241px;
height:9px;
}
.Right_background {
position: relative;
background:url(../images/background_right_pattern.jpg);
z-index:6;
width:241px;
}
.Right_text {
position: relative;
background:url(../images/background_right_pattern.jpg);
z-index:7;
width:231px;
padding-left: 4px;
padding-top: 4px;
}
.Bar {
background:url(../images/bar.png);
width: 100%;
height:1px;
overflow:hidden;
margin-top:4px;
margin-bottom:4px;
}
#Footer_Top {
position: relative;
z-index: 7;
background:url(../images/background_footer_top.jpg) no-repeat;
width:754px;
height:9px;
}
#Footer{
position: relative;
clear:both;
z-index: 7;
background:url(../images/background_footer_center.jpg) repeat-y;
width: 754px;
left: 5px;
top: 5px;
}
#Footer_Bottom {
position: relative;
z-index: 7;
background:url(../images/background_footer_bottom.jpg) no-repeat;
width:754px;
height:9px;
}
#Footer_Text {
position: relative;
z-index: 8;
width:746px;
left:4px;
bottom: 8px;
margin-top: 15px;
}
#Menu {
position: absolute;
top: 133px;
left: 50%;
margin-left: -417px;
z-index: 4;

}
#imageMenu {
	position: relative;
	width: 795px;
	height: 200px;
	overflow: hidden;
	
}
#imageMenu ul {
	list-style: none;
	margin: 0px;
	display: block;
	height: 200px;
	width: 1000px;
	
	}

#imageMenu ul li {
	float: left;
}

#imageMenu ul li a {
	text-indent: -1000px;
	background:#FFFFFF none repeat scroll 0%;
	border-right: 0px;
	cursor:pointer;
	display:block;
	overflow:hidden;
	width:94px;
	height: 200px;
}

#imageMenu ul li.button1 a {
	background: url(../images/button1.png) repeat scroll 0%;
}
#imageMenu ul li.button2 a {
	background: url(../images/button2.png) repeat scroll 0%;
}
#imageMenu ul li.button3 a {
	background: url(../images/button3.png) repeat scroll 0%;
}
#imageMenu ul li.button4 a {
	background: url(../images/button4.png) repeat scroll 0%;
}
#imageMenu ul li.button5 a {
	background: url(../images/button5.png) repeat scroll 0%;
}
#imageMenu ul li.button6 a {
	background: url(../images/button6.png) repeat scroll 0%;
}
#imageMenu ul li.button7 a {
	background: url(../images/button7.png) repeat scroll 0%;
}
#imageMenu ul li.button8 a {
	background: url(../images/button8.png) repeat scroll 0%;
}
.clear {
	clear: both;
}
Thanks in advance