Access HTML code from C-sharp

// HTML code
<div id="DataFromSession" runat="server"></div>

///set data from C# to HTML
var Id = Session["EmpId"];
var UserType = Session["SUserType"];
DataFromSession.InnerHtml = "<script type='text/javascript'>var IdJson=" + Id + ";var UserTypeJson=" + UserType + ";</script>";

/// Access above data (UserTypeJson,IdJson) from js
 if (parseInt(UserTypeJson) > 1 && IdJson != self.EmpId()) {
    toastr.warning('You dont have enough privillege to save other employee information', 'Invalid');
    isValid = false;
}

write C-sharp code in HTML

--- Access session data in HTML page
 <input id="sessionInput" type="hidden" value='<%= Session["EmpAutoID"] %>' />
 
 <table style="width: 100%">
    <tr>
        <td class="Company"><%=ApprovalSystem.Classes.Common.ReportCommonData.ReportCompany %></td>
    </tr>
    
    <tr>
        <td style="width: 129px"><b>Company</b></td>
        <td style="width: 12px"><b>:</b></td>
        <td style="width: 350px;"><%if (mainTable.Rows.Count > 0)
                                  {
                                      Response.Write(mainTable.Rows[0]["Company"].ToString());
                                  } %></td>

         <td style="width: 179px"><b>General Duty Date</b></td>
        <td style="width: 5px"><b>:</b></td>
        <td style="width: 350px;"><% if (mainTable != null && mainTable.Rows.Count > 0) 
                                    {
                                        Response.Write(mainTable.Rows[0]["GeneralDutyDate"].ToString());
                                    } %></td>
    
    </tr>
</table>