(我在一个 jsfiddle 站点中有这个,可以在这里看到。)
以下是 Internet Explorer 中发生的情况:

这就是我希望它看起来的样子,具有讽刺意味的是,IE 正在做我想做的事。
当我在 Chrome 或 Firefox 中查看此内容时,会发生以下情况:

正如你所看到的,它没有从中心分裂。
这是我的剃须刀页面的样子:
@using System.Collections
@using SuburbanCustPortal.SuburbanService
@model SuburbanCustPortal.SuburbanService.CustomerData      
@{
    ViewBag.Title = "Account Screen";
 }
<h2>AccountScreen</h2>
<div class="leftdiv">
  <fieldset>
    <legend>Customer Info</legend>
    @Html.Partial("CustomerInfo", Model)
  </fieldset>
  <fieldset>
    <legend>Delivery Address</legend>
    @Html.Partial("DeliveryAddress", Model)
  </fieldset>
  <fieldset>
    <legend>Delivery Info</legend>
    @Html.Partial("DeliveryInfo", Model)
  </fieldset>
</div>
<div class="rightdiv">
  <fieldset> 
    <legend>Balance</legend>
      @Html.Partial("AccountBalance", Model)
  </fieldset>
  <fieldset>
    <legend>Account Options</legend>
    <br/>
     @using (Html.BeginForm("AccountScreenButton", "Customer", FormMethod.Post))
    {
      <div class="sidebysidebuttons">
        <div class="box">
          <button name="options" value="payment">Make a Payment</button>
           
          <button name="options" value="activity">Display Activity</button>
        </div>
      </div>      
    }
  </fieldset>
  <fieldset> 
      <legend>Billing Info</legend>
        @Html.Partial("BillingInfo", Model)
    </fieldset>
</div>
这是在我正在调用的css文件中:
.leftdiv {
    float: left;
    width: 49%;
  text-align: left;
  display: inline;
}
.rightdiv {
    float: right;
    width: 49%;
  text-align: left;
    display: inline;
}
.sidebysidebuttons {
 float: left;
 display: block;
  margin-left: 60px;  
text-align:center   
}
任何人都知道我怎样才能让它们看起来一样,或者两者都像 IE 如何显示它们或看到我做错了什么?
===== 根据要求 =====
这是页面加载后的页面源:
<!DOCTYPE html>
<html>
<head>
  <title>Your Company Name Here : Account Screen</title>
  <link href="/Content/reset.css" rel="stylesheet" type="text/css" />
    <link href="/Content/Site.css" rel="stylesheet" type="text/css" />
    <link href="/Content/web.css" rel="stylesheet" type="text/css" />
    <script src="/Scripts/jquery-1.5.1.min.js" type="text/javascript"></script>
    <script src="/Scripts/Views/main.js" type="text/javascript"></script>
    <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
  <meta http-equiv="Pragma" content="no-cache" />
  <meta http-equiv="Expires" content="0" />
    <script>
        $(function () {
            $('.focus :input').focus();
        });
    </script>
</head>
    <body>
        <div class="page">
            <div id="header">
                <div id="headerimg"></div>  
                <div id="logindisplay">
                        Welcome <strong>webtest</strong>!
    [ <a href="/Account/LogOff">Log Off</a> ]
                </div>
                <div id="menucontainer">
                    <ul id="menu">
               <li><a href="http://www.xxxxxx.com">Home</a></li>
                          <li><a href="/Customer/AccountScreen">Account</a></li>
                          <li><a href="/Payment/PrePayment">Make Payment</a></li>
                          <li><a href="/GasOrder/OrderGas">Order Gas</a></li>
                          <li><a href="/Home/ContactUs">Contact Us</a></li>
                          <li><a href="/Account/UpdateAccount">Update Login</a></li>
                          <li><a href="/Home/NewsList">* Sales *</a></li>
                    </ul>
                </div>
                <div id="main">
<h2>AccountScreen</h2>
<div class="leftdiv">
  <fieldset>
    <legend>Customer Info</legend>
<div  class="leftdiv">
  <br/>
  <label class="sizedCustomerlabel">Account Number:</label>            
  <label class="sizedCustomerlabel">Name:</label>
  <label class="sizedCustomerlabel">Mailing Address:</label>
  <label class="sizedCustomerlabel">City:</label>
  <label class="sizedCustomerlabel">St/Zip:</label>
  <label class="sizedCustomerlabel">Phone Number:</label>
</div>
<div class="rightdiv">
  <br/>
  <label class="sizedCustomerDataLeftLabel">01 - 02228 </label>
  <label class="sizedCustomerDataLeftLabel">PICKERING VALLEY CONTRAC </label>
  <label class="sizedCustomerDataLeftLabel">960 POTTSTOWN PIKE </label>
  <label class="sizedCustomerDataLeftLabel">CHESTER SPRINGS </label>
  <label class="sizedCustomerDataLeftLabel">PA  19425 </label>
  <label class="sizedCustomerDataLeftLabel">610 458-7200</label>
</div>
  </fieldset>
  <fieldset>
    <legend>Delivery Address</legend>
<div  class="leftdiv">
  <br/>
  <label class="sizedCustomerlabel">Care of:</label>
  <label class="sizedCustomerlabel">Delivery Street:</label>            
  <label class="sizedCustomerlabel">Delivery City:</label>  
</div>
<div class="rightdiv">
  <br/>
  <label class="sizedCustomerDataLeftLabel"> </label>
  <label class="sizedCustomerDataLeftLabel"> </label>
  <label class="sizedCustomerDataLeftLabel"> </label>  
</div>
  </fieldset>
  <fieldset>
    <legend>Delivery Info</legend>
<div  class="leftdiv">
  <br/>
  <label class="sizedCustomerlabel">Last Delivery Date:</label>
  <label class="sizedCustomerlabel">Number of Tanks:</label>            
  <label class="sizedCustomerlabel">Tank Serial#:</label>  
  <label class="sizedCustomerlabel">Tank Size:</label> 
  <label class="sizedCustomerlabel">Tank Type:</label> 
  <label class="sizedCustomerlabel">Qty Last Delivered:</label> 
  <label class="sizedCustomerlabel">Year To Date Deliveries:</label> 
  <label class="sizedCustomerlabel">Year To Date Gas:</label> 
  <label class="sizedCustomerlabel">Total Used Last Year:</label> 
</div>
<div class="rightdiv">
  <br/>
  <label class="sizedCustomerDataLeftLabel">10/16/2012 </label>
  <label class="sizedCustomerDataLeftLabel">1 </label>
  <label class="sizedCustomerDataLeftLabel"> </label>
  <label class="sizedCustomerDataLeftLabel">30 </label>
      <label class="sizedCustomerDataLeftLabel">  </label>
  <label class="sizedCustomerDataLeftLabel">15 </label>  
  <label class="sizedCustomerDataLeftLabel">4 </label>  
  <label class="sizedCustomerDataLeftLabel">70.4 </label>  
  <label class="sizedCustomerDataLeftLabel">117.0 </label>  
</div>
  </fieldset>
</div>
<div class="rightdiv">
  <fieldset> 
    <legend>Balance</legend>
    <div>
<div class="leftdiv">
  <br/>
  <label class="sizedCustomerlabel">Over 30:</label>
  <label class="sizedCustomerlabel">Over 60:</label>
  <label class="sizedCustomerlabel">Over 90:</label>
  <label class="sizedCustomerlabel">Over 120:</label>
  <label class="sizedCustomerlabel">Current:</label>
  <label class="sizedCustomerlabel">Total:</label>
</div>
<div class="rightdiv">
  <br/>
  <label class="sizedCustomerDataRightlabel">$7.15 </label>
  <label class="sizedCustomerDataRightlabel">$90.48 </label>
  <label class="sizedCustomerDataRightlabel">$5.50 </label>
  <label class="sizedCustomerDataRightlabel">$37.31 </label>
  <label class="sizedCustomerDataRightlabel">$7.34 </label>
  <label class="sizedCustomerDataRightLabelRed">$147.78 </label>
</div>
    </div>    
  </fieldset>
  <fieldset>
    <legend>Account Options</legend>
    <br/>
<form action="/Customer/AccountScreenButton" method="post">      <div class="sidebysidebuttons">
        <div class="box">
          <button name="options" value="payment">Make a Payment</button>
           
          <button name="options" value="activity">Display Activity</button>
        </div>
      </div>      
</form>
  </fieldset>
    <fieldset> 
      <legend>Billing Info</legend>
      <div>
<div class="leftdiv">
  <br/>
  <label class="sizedCustomerlabel">Budget Bal:</label>
  <label class="sizedCustomerlabel">Budget Rate:</label>
  <label class="sizedCustomerlabel">Non-Budget Bal:</label>
  <label class="sizedCustomerlabel">LastPayment Date:</label>
  <label class="sizedCustomerlabel">Last Payment Amount:</label>
  <label class="sizedCustomerlabel">Security Deposit:</label>
  <label class="sizedCustomerlabel">Prev Statment Bal:</label>
</div>
<div class="rightdiv">
  <br/>
  <label class="sizedCustomerDataRightlabel">$0.00 </label>
  <label class="sizedCustomerDataRightlabel">$0.00 </label>
  <label class="sizedCustomerDataRightlabel">$0.00 </label>
  <label class="sizedCustomerDataRightlabel">06/27/2012 </label>
  <label class="sizedCustomerDataRightlabel">$59.25 </label>
  <label class="sizedCustomerDataRightlabel">$0.00 </label>
  <label class="sizedCustomerDataRightlabel">$147.78 </label>
</div>
      </div>    
    </fieldset>
</div>
                    <div style="clear: both;"></div>
                </div>
                <div id="footer">
                </div>
            </div>
        </div>
    </body>
</html>