Código HTML:
<html> <head> <!-- Copiar dentro del tag HEAD --> <script LANGUAGE="JavaScript"> <!-- sortitems = 1; function move(fbox,tbox) { for(var i=0; i<fbox.options.length; i++) { if(fbox.options[i].selected && fbox.options[i].value != "") { var no = new Option(); no.value = fbox.options[i].value; no.text = fbox.options[i].text; tbox.options[tbox.options.length] = no; fbox.options[i].value = ""; fbox.options[i].text = ""; } } BumpUp(fbox); if (sortitems) SortD(tbox); } function BumpUp(box) { for(var i=0; i<box.options.length; i++) { if(box.options[i].value == "") { for(var j=i; j<box.options.length-1; j++) { box.options[j].value = box.options[j+1].value; box.options[j].text = box.options[j+1].text; } var ln = i; break; } } if(ln < box.options.length) { box.options.length -= 1; BumpUp(box); } } function SortD(box) { var temp_opts = new Array(); var temp = new Object(); for(var i=0; i<box.options.length; i++) { temp_opts[i] = box.options[i]; } for(var x=0; x<temp_opts.length-1; x++) { for(var y=(x+1); y<temp_opts.length; y++) { if(temp_opts[x].text > temp_opts[y].text) { temp = temp_opts[x].text; temp_opts[x].text = temp_opts[y].text; temp_opts[y].text = temp; temp = temp_opts[x].value; temp_opts[x].value = temp_opts[y].value; temp_opts[y].value = temp; } } } for(var i=0; i<box.options.length; i++) { box.options[i].value = temp_opts[i].value; box.options[i].text = temp_opts[i].text; } } // --> </script> </head> <body> <!-- Copiar dentro del tag BODY --> <form ACTION METHOD="POST"> <table border="0"> <tr> <td><select multiple size="5" name="list1"> <option value="11"> item 1.1 </option> <option value="12"> item 1.2 </option> <option value="13"> item 1.3 </option> </select></td> <td><input type="button" value=" >> " onclick="move(this.form.list1,this.form.list2)" name="B1"><br> <input type="button" value=" << " onclick="move(this.form.list2,this.form.list1)" name="B2"> </td> <td><select multiple size="5" name="list2"> </select></td> </tr> </table> <table border="0"> <tr> <td><select multiple size="5" name="list3"> <option value="11"> item 1.1 </option> <option value="12"> item 1.2 </option> <option value="13"> item 1.3 </option> </select></td> <td><input type="button" value=" >> " onclick="move(this.form.list3,this.form.list4)" name="B1"><br> <input type="button" value=" << " onclick="move(this.form.list4,this.form.list3)" name="B2"> </td> <td><select multiple size="5" name="list4"> </select></td> </tr> </table> <input type="button" value="Agregar" onclick = "this.form.action = 'guardar.php'; this.form.submit()"> </form> </body> </html>
Gracias y espero alguien pueda ayudarme.
Saludos.