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                <form method="post" action="">
<td>Mine livretter<br>
<select multiple name="select1" size='8' style="width:200px">
<option value='1'>Indisk curry</option>
<option value='2'>Pasta med pesto</option>
<option value='3'>Humus</option>

<input type='button' style="width:70px;" value='< Tilføj'
<input type='button' style="width:70px;" value='Fjern  >'

<td>Tilgængelige retter<br>
<select multiple name="select2" size='8' style="width:200px">
<option value='4'>Pasta med ketchup</option>
<option value='5'>Lasagne</option>
<option value='6'>Big mac</option>
<option value='7'>Whopper med cheese</option>
<option value='8'>Pizza</option>
<option value='9'>Shawarma</option>

<p><input type="button" value="Send data" onClick="SelectAll(this.form.select1);submit()">




                <!-- Dette script og mange flere --> 
<!-- findes hos --> 
<!-- Start 

function deleteOption(object,index) {
    object.options[index] = null;

function addOption(object,text,value) {
    var defaultSelected = true;
    var selected = true;
    var optionName = new Option(text, value, defaultSelected, selected)
    object.options[object.length] = optionName;

function copySelected(fromObject,toObject) {
    for (var i=0, l=fromObject.options.length;i<l;i++) {
        if (fromObject.options[i].selected)
    for (var i=fromObject.options.length-1;i>-1;i--) {
        if (fromObject.options[i].selected)

function SelectAll(fromObject) {
    for (var i=0, l=fromObject.options.length;i<l;i++) {
        fromObject.options[i].text,fromObject.options[i].selected = true;