document.write('<form method=post>');
document.write('<select name="navi">');
document.write('<option value="/jp/index.html" selected="selected">Japanese</option>');
document.write('<option value="/en/index.html" selected="selected">English</option>');
document.write('<option value="/index.html" selected="selected">Portuguese</option>');

document.write('</select>');
document.write('<input type=button value="Go" onClick="location.href = this.form.navi.options[this.form.navi.selectedIndex].value" class="submit">');
document.write('</form>');