Estimados una consulta muy urgente, pues vengo bastante tiempo buscando esto y no encuentro..
 
Tengo dos formularios 
PRIMER FOMULARIO BUSCA 
el catalogo en un combo y el articulo en una caja de texto y el boton buscar...
mas abajo el boton "AÑADIR" 
lo que hace es que cuando lo encuentra al darle click en el boton añadir
lo lleva a mi grilla que se encuentra en el siguiente FORMULARIO GRILLA 
me funciona correctamente.... 
LO QUE QUIERO  ES QUE CUANDO DEAN CLICK EN EL BOTON AÑADIR AL CARGAR LA PAGINA NO SE BORRE LA SELECCION DEL COMBOBOX 
 Código PHP:
   
<form method="post" action="insertar/GrabarBorradorDetPedido.php">        
            
                <?php
                 
                 $catalogos=isset($_POST["catalogo"])? $_POST["catalogo"]: ''; 
                 $buscando=isset($_POST["articulos"])? $_POST["articulos"]: ''; 
                 $buscar="";
                
               
                
                $tabla = "TGE_ARTICULOS";
 
                //$sql="select top 10 * from TGE_ARTICULOS where art_codigo like '%$buscar%' or art_descrip like '%$buscar%'";                    
                //$rs=sqlsrv_query($conn,$sql) or die ("No ejecuto la TABLA : $tabla");
                $cia="00001";
                $sucursal="01";
                $almacen="02";
                
                if ($buscando=="") {
                
                        $sql="exec sp_busca_articulo_6_web '$cia','$sucursal','$almacen','$buscar','','','T','$catalogos'";
                                              
                                }
                else
                                             {
                        $sql="exec sp_busca_articulo_6_web '$cia','$sucursal','$almacen','$buscando','','','T','$catalogos'";
                                }
                                                                        
                $rs=sqlsrv_prepare($conn,$sql);
                sqlsrv_execute($rs);
 
                MostrarTabla($tabla, $rs, $conn, $sql);
                
                
                ?>
                
        
        
                  <?php
                            function MostrarTabla($tabla,$rs,$sw){
                            $campos= sqlsrv_num_fields($rs);
                            $numfilas=sqlsrv_num_rows($rs);
                            $sw=1;
                    ?>
                    
    
                        <table class="uk-table">
                                    <thead>
                                        <tr bgcolor="#B6D1F2">
                                            <th><b></b></th>
                                            <th><b>ARTICULO</b></th>
                                            <th><b>IMAGEN</b></th>
                                            <th><b>DESCRIPCIÓN</b></th>
                                              <th><b>STOCK</b></th>
                                            <th><b>PRECIO</b></th>
                                            <th><b>CANTIDAD</b></th>
                                            <th><b></b></th>
                                        </tr>
                                    </thead>
                                    <tbody>
                    
                    <?php while($filas=sqlsrv_fetch_array($rs)){
                        if($sw=="1")
                        {
                     ?>                
                                        <tr>
                                            <td style="visibility:hidden"><input type="checkbox"  value="<?=$filas[0]?>" name="art_codigo[]" checked="checked" ></td>
                                            <td class="uk-text-nowrap"><?=$filas[0]?> | <?=$filas[38]?></td>
                                        
                                            
                                             
                                          
                                           <td class="uk-text-nowrap">
                                           <a href=VerImagen.php?cod=<?=$filas[0]?> target="_blank" onClick="window.open(this.href,this.target,'width=250,height=250,top=100,left=200,toolbar=no,location=no,status=no,menubar=no');return false;">
                                           <img src="<?php
                                           $img=$filas[35];
                                           $fot=substr($img, 34,37); 
                                           echo $fot;
                                           ?>" border="0" width="30px" height="30px" class="zoom">                                           </a>                                           </td>
                                            
                                          
                                            <td class="uk-text-nowrap"><?=utf8_encode($filas[2])?></td>
                                            <td class="uk-text-nowrap"><?php 
                                                                        $numero=$filas[27];
                                                                        $resultado=number_format($numero,2, '.', '');
                                                                        if ($resultado >=1)
                                                                                    {
                                                                                        echo "<font color='#444999'><b>$resultado</b></font>"; 
                                                                                 }
                                                                        else
                                                                                     {
                                                                                          echo "<font color='#FF0000'><b>$resultado</b></font>"; 
                                                                                }
                                                                         
                                                                        ?></td> 
                                            <td class="uk-text-nowrap"><input type="text" name="precio[]" style="width:40PX" value="<?=number_format($filas[19],2, '.', '')?>" readonly="" /></td>
                                            <td class="uk-text-nowrap"><input type="text" name="cantidad[]" style="width:40PX"  onKeyPress="return esInteger(event)"  /></td>
                                            <td class="uk-text-nowrap" style="visibility:hidden"><input type="text" name="stock[]" style="width:40PX" value="<?=utf8_encode($filas[27])?>" readonly=""  /></td>
                                        </tr>
                    <?php 
                        $sw="0";
                        }elseif($sw=="0")
                        {
                       ?>                        
                                        <tr> 
                                            <td style="visibility:hidden" ><input type="checkbox"  value="<?=$filas[0]?>" name="art_codigo[]" checked="checked" ></td>  
                                             <td class="uk-text-nowrap"><?=$filas[0]?> | <?=$filas[38]?></td>
                                            
                                           <td class="uk-text-nowrap">
                                           <a href=VerImagen.php?cod=<?=$filas[0]?> target="_blank" onClick="window.open(this.href,this.target,'width=250,height=250,top=100,left=200,toolbar=no,location=no,status=no,menubar=no');return false;">
                                           <img src="<?php
                                           $img=$filas[35];
                                           $fot=substr($img, 34,37); 
                                           echo $fot;
                                           ?>" border="0" width="30px" height="30px" class="zoom">                                           </a>                                           </td>
                                            
                                            
                                            
                                            
                                           
                                            <td class="uk-text-nowrap"><?=utf8_encode($filas[2])?></td>
                                            <td class="uk-text-nowrap"><?php 
                                                                        $numero=$filas[27];
                                                                        $resultado=number_format($numero,2, '.', '');
                                                                        if ($resultado >=1)
                                                                                    {
                                                                                        echo "<font color='#444999'><b>$resultado</b></font>"; 
                                                                                 }
                                                                        else
                                                                                     {
                                                                                          echo "<font color='#FF0000'><b>$resultado</b></font>"; 
                                                                                }
                                                                         
                                                                        ?></td> 
                                            <td class="uk-text-nowrap"><input type="text" name="precio[]" style="width:40PX" value="<?=number_format($filas[19],2, '.', '')?>" readonly="" /></td> 
                                            <td class="uk-text-nowrap"><input type="text" name="cantidad[]" style="width:40PX" onKeyPress="return esInteger(event)" /></td> 
                                            <td class="uk-text-nowrap" style="visibility:hidden"><input type="text" name="stock[]" style="width:40PX" value="<?=utf8_encode($filas[27])?>" readonly=""   /></td>
                                        </tr>
                                        
                <?php
                            $sw="1";
                            }
                            } 
                ?>                     
                                    </tbody>
                          </table>
            <?php             
            } 
            ?>
    
            <div style="visibility:hidden"><input type="text" name="codinterval" value="<?php echo $referencia ?>" readonly=""></div>
            
            <!--<div align="center"><button type="submit" class="md-btn md-btn-primary uk-margin-small-top"><i class="fa fa-save"></i>Añadir</button></div> -->
            <?php
                            $opcion="NO";
                            if ($tipocliente <> $opcion)
                            {
                                echo "<div align='center'><button type='submit' class='md-btn md-btn-primary uk-margin-small-top'><i class='fa fa-save'></i>Añadir</button></div>";
                            }
                                else
                            {
                              echo "<div align='center'><button type='submit' class='md-btn md-btn-primary uk-margin-small-top' disabled='disabled'><i class='fa fa-save'></i>Añadir</button></div>";
                            }
            ?>
        
            </form>   
  por favor esto es urgente ayudenmeeeeee