Using float:left to arrange div horizontally failed to solve the puzzle

<div style="width: 600px;">
                      <div id="update_1" style="float:left;width: 100px;" ><input type="button" name="Submit2" value="" onCLick="checkForm()"></div>
                     <div style="float:left;width: 100px;"><input type="button" name="Submit3" value="" onClick="javascript:window.location.replace("../blank.html");"></div>
                     <div style="float:left;width: 100px;"><input type="reset" name="Reset" value=""></div>
                  </div>

as above, the three internal div are arranged horizontally, and the effect is still vertical
I don"t know what"s wrong, solve

the complete code is shown below

<%@ page language="java" import="java.util.*,java.text.SimpleDateFormat" pageEncoding="UTF-8"%>
<html>
<%
    String contextPath = request.getContextPath();
%>
<script>

  function checkForm() {
     
   if (employAddForm.EmployName.value == "") {
    alert ("");
    document.employAddForm.EmployName.focus();
    return false;
      }
    
   if (employAddForm.EmployRealName.value == "") {
    alert ("");
    document.employAddForm.EmployRealName.focus();
    return false;
      }
       if (employAddForm.EmployPWD.value == "") {
    alert ("");
    document.employAddForm.EmployPWD.focus();
    return false;
      }
      
      if (employAddForm.EmployPWD.value != employAddForm.EmployPWD2.value) {
    alert ("2");
    document.employAddForm.EmployName.focus();
    return false;
      }
      
  //    if (document.employAddForm.EmployMPhone.value.length!=11) {
    //        alert("11");
    //        document.employAddForm.EmployMPhone.focus();
    //        return false;
    //    }
      document.employAddForm.action = "<%=request.getContextPath() %>/EmployAction";
    document.employAddForm.submit();
    
}
</script>

<head>
        <meta HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=gb2312">
        <style type="text/css">
<!--
.style1 {font-size: 16px}
-->
        </style>
    </head>
    <body  topmargin="0" leftmargin="0">
     <div align="center"><font color=-sharpFF0000>${requestScope.msg } </font></div>
    <form name="employAddForm" method="post" action="<%=request.getContextPath() %>/EmployAddAction">
          

<div align="center"><font color=-sharp000000></font></div>

<table width="800" border="0" align="center"> <tr> <td width="83"><span class="style1">:</span></td> <td width="323"><span class="style1"> <input type="text" name="EmployName"> </span><br><span name="div41" id="div41"></span></td> <td width="85"><span class="style1">:</span></td> <td width="291"><span class="style1"> <input type="text" name="EmployRealName"> </span></td> </tr> <tr> <td><span class="style1">:</span></td> <td><span class="style1"> <input type="password" name="EmployPWD" > </span></td> <td><span class="style1"> :</span></td> <td><span class="style1"> <label> <input type="radio" name="EmploySex" value="" checked> </label> <label> <input type="radio" name="EmploySex" value=""> </label> <label></label> </span></td> </tr> <tr> <td><span class="style1">:</span></td> <td><span class="style1"> <input type="password" name="EmployPWD2" > </span></td> <td><span class="style1">:</span></td> <td><span class="style1"> <select name="EmployClass"> <option value="0">0-</option> <option value="1">1-</option> <option value="2" selected>2-</option> </select> </span></td> </tr> <tr> <tr> <td><span class="style1">:</span></td> <td><span class="style1"> <input type="text" name="EmployIDNum"> </span></td> <td><span class="style1">:</span></td> <td><span class="style1"> <input type="text" name="EmployMPhone"> </span></td> </tr> <tr> <td><span class="style1"> :</span></td> <td colspan="3"><span class="style1"> <input name="EmployAddress" type="text" value=""> </span></td> </tr> <tr> <td><span class="style1"></span></td> <td colspan="3"><div align="center"> <div style="width: 600px;"> <div id="update_1" style="float:left;width: 100px;" ><input type="button" name="Submit2" value="" onCLick="checkForm()"></div> <div style="float:left;width: 100px;"><input type="button" name="Submit3" value="" onClick="javascript:window.location.replace("../blank.html");"></div> <div style="float:left;width: 100px;"><input type="reset" name="Reset" value=""></div> </div> <% SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); String date = sdf.format(new Date()); %> <input type="hidden" name="EmployDate" value="<%=date%>"> <p class="style1">

</div></td> </tr> </table>

</form> <iframe name="iframe1" id="iframe1" width="0" height="0" scrolling=auto > </iframe> </body> </html>
Mar.02,2021

is arranged horizontally on my side

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3a8d5-2b99d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3a8d5-2b99d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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