document.write('<option value=1>|-&nbsp;北京</option>');
document.write('<option value=2>|-&nbsp;上海</option>');
document.write('<option value=3>|-&nbsp;无锡</option>');
document.write('<option value=4>|-&nbsp;广州</option>');
document.write('<option value=5>|-&nbsp;成都</option>');
document.write('<option value=6>|-&nbsp;昆明</option>');
document.write('<option value=7>|-&nbsp;南京</option>');