Hola
jorgedx
No se si te habré entendido bien
Prueba esto:
Código PHP:
<html>
<head>
<script type="text/javascript">
function pasar() {
obj = document.getElementById('sel1');
num = obj.options.length;
for (i=num-1; i>=0; i--) {
txt=obj.options[i].text;
valor=obj.options[i].value;
obj.options[i]=null;
obj2=document.getElementById('sel2');
opc = new Option(txt,valor);
eval(obj2.options[i]=opc);
}
}
</script>
</head>
<body>
<select id="sel1" size="5" multiple="multiple">
<option value="1">Uno</option>
<option value="2">Dos</option>
<option value="3">Tres</option>
<option value="4">Cuatro</option>
<option value="5">Cinco</option>
</select>
<select id="sel2" size="5">
</select>
<input type="button" onclick="pasar()" />
</body>
</html>
Saludos,
