function load1(form) {
     var url = form.Llist_1.options[form.Llist_1.selectedIndex].value;
     if (url != '') location.href = url;
     return false;
}

document.write('<select name="Llist_1" onChange="load1(this.form)">');
document.write('<option selected>__ Select model__');
document.write('<option value="/site/pc/home.nsf/descriptions/RPC25">RoverPC G7');
document.write('<option value="/site/pc/home.nsf/descriptions/RPC24">RoverPC V7');
document.write('<option value="/site/pc/home.nsf/descriptions/RPC22">RoverPC X7');
document.write('<option value="/site/pc/home.nsf/descriptions/RPC26">RoverPC G7');
document.write('</select>');