incolonnare div avendo 2 4 colonne

[Kahm]

inizialmente avevo una tabella formata da 4 colonne
label, textbox, label ,textbox
ho voluto togliere la table e inserire dei DIV
ma ora mi ritrovo tutto stravolto e nessun controllo mantiene l'ordine di incolonnamento
ho provato a settare il width:50% ad ogni div, ma sembra non funzionare

cosa devo fare?

     
            <div style="float:left; display:block; ">                    <span id="ContentPlaceHolder1_Label1" style="font-weight:bold;">Titolo</span>                                    <input name="TXT_Titolo" type="text" id="ContentPlaceHolder1_TXT_Titolo" style="width:250px;" />                                   <span id="ContentPlaceHolder1_Label11" style="font-weight:bold;">Iscritto</span>                                  <span id="ContentPlaceHolder1_lblDataRegistrazione" style="font-weight:bold;"></span>        <input type="submit" name="cmdNuovo0" value="Rinnova" id="ContentPlaceHolder1_cmdNuovo0" /></div>            <div style="clear:both;"></div>               <div style="float:left; display:block;width:100%  ">                    <span id="ContentPlaceHolder1_Label13" style="font-weight:bold;">Immagine</span>                                                    <input type="file" name="FileUpIMGPrinc" id="ContentPlaceHolder1_FileUpIMGPrinc" />                                                 <input type="submit" name="cmdCaricaIMGPrinc" value="Carica" id="ContentPlaceHolder1_cmdCaricaIMGPrinc" />                                                                        <input type="image" name="imgCancPrinc" id="ContentPlaceHolder1_imgCancPrinc" src="images/delete.png" onclick="return confirm('sei sicuro di cancellare?');" />                 </div>                   <div style="clear:both;"></div>                       <div style="float:left; display:block;width:50%  ">                    <span id="ContentPlaceHolder1_Label2" style="font-weight:bold;">Descrizione</span>                                   <textarea name="TXT_Descrizione" rows="2" cols="20" id="ContentPlaceHolder1_TXT_Descrizione" style="height:49px;width:500px;"></textarea>                                  </div>                   <div style="clear:both;"></div>                      <div style="float:left; display:block; ">                    <span id="ContentPlaceHolder1_Label4" style="font-weight:bold;">Sconto</span>                                  <input name="TXT_Sconto" type="text" id="ContentPlaceHolder1_TXT_Sconto" style="width:200px;" />                 </div> <div style="float:left; display:block; ">                    <span id="ContentPlaceHolder1_Label10" style="font-weight:bold;">Sito Web</span>                                  <input name="TXT_SitoWeb" type="text" id="ContentPlaceHolder1_TXT_SitoWeb" style="width:200px;" />                </div>                   <div style="clear:both;"></div>                       <div style="float:left; display:block; ">                    <span id="ContentPlaceHolder1_Label3" style="font-weight:bold;">Indirizzo</span>                                <input name="TXT_Indirizzo" type="text" id="ContentPlaceHolder1_TXT_Indirizzo" style="width:200px;" />               </div>                  <div style="float:left; display:block; ">                    <span id="ContentPlaceHolder1_Label9" style="font-weight:bold;">TipoNegozio</span>                                  <select name="CBB_TipoNegozio" id="ContentPlaceHolder1_CBB_TipoNegozio">    <option value="4">A ltro</option>    <option value="1">Alimentari</option>    <option value="7">Eventi</option>    <option value="8">Gioielleria</option>    <option value="2">Market</option>    <option value="5">Parrucchiere</option>    <option value="3">Ristorante</option>    <option value="6">Scarpe</option>    <option value="9">Vestiario</option>
</select>                    

  </div>                   <div style="clear:both;"></div>                     <div style="float:left; display:block;">                    <span id="ContentPlaceHolder1_Label5" style="font-weight:bold;">Provincia</span>                                       <div id="ContentPlaceHolder1_UP_provincie">                        <select name="CBB_Provincia" onchange="javascript:setTimeout('__doPostBack(\'CBB_Provincia\',\'\')', 0)" id="ContentPlaceHolder1_CBB_Provincia">        <option selected="selected" value="AG">Agrigento</option>        <option value="AL">Alessandria</option>        <option value="AN">Ancona</option>        <option value="AO">Aosta</option>        <option value="AR">Arezzo</option>            <option value="VC">Vercelli</option>        <option value="VR">Verona</option>        <option value="VI">Vicenza</option>        <option value="VT">Viterbo</option>
    </select>                                    </div>                         </div>    <div style="float:left; display:block;">
                    <span id="ContentPlaceHolder1_Label6" style="font-weight:bold;">Citta</span>                                                      <div id="ContentPlaceHolder1_UPComuni">       <select name="CBB_Comune" id="ContentPlaceHolder1_CBB_Comune">        <option value="74">AGRIGENTO</option>        <option value="146">ALESSANDRIA DELLA ROCCA</option>        <option value="285">ARAGONA</option>        <option value="6581">SANTO STEFANO QUISQUINA</option>        <option value="6712">SCIACCA</option>        <option value="6870">SICULIANA</option>        <option value="7866">VILLAFRANCA SICULA</option>
    </select>                    

                        </div>                                </div>                  <div style="clear:both;"></div>                      <div style="float:left; display:block;width:100%  ">                    <span id="ContentPlaceHolder1_Label8" style="font-weight:bold;">Latitudine</span>                                   <input name="TXT_Latitudine" type="text" id="ContentPlaceHolder1_TXT_Latitudine" style="width:200px;" />                                    <span id="ContentPlaceHolder1_Label7" style="font-weight:bold;">Longitudine</span>                                  <input name="TXT_Longitudine" type="text" id="ContentPlaceHolder1_TXT_Longitudine" style="width:200px;" />          </div>                   <div style="clear:both;"></div>                      <div style="float:left; display:block;width:50%  ">                    <input type="submit" name="CMD_OttieniCoordinate" value="Ottieni Coordinate" id="ContentPlaceHolder1_CMD_OttieniCoordinate" />                                  <div>    <table cellspacing="0" cellpadding="4" id="ContentPlaceHolder1_GridView1" style="color:#333333;width:100%;border-collapse:collapse;">        <tr>            <td>                            <span id="ContentPlaceHolder1_GridView1_CMD_OttieniCoordinate" style="color:Red;">Nessun risultato, Cerca con nominativo</span>                        </td>        </tr>    </table></div>                                  <input type="submit" name="CMD_OttieniCoordinate0" value="Salva" id="ContentPlaceHolder1_CMD_OttieniCoordinate0" />                                  </div>    


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