我有多个选择选项值在线预约表格 . 我的项目就像这个项目(Show a second dropdown based on previous dropdown selection)
我在一些jquery代码上清除用户选择其他选项时的选项,事情是我将如何验证表单,我的意思是在第二级选择选项值中选择至少一个选项 .
我已经尝试在验证php页面上使用此代码
else if ($appointment_gc == " "
|| $appointment_fu == " "
|| $appointment_gas == " "
|| $appointment_col == " "
|| $appointment_ent == " "
|| $appointment_ort == " "
|| $appointment_ps == " "
|| $appointment_package == " " ) {
echo "Submission fails. You have not choose any package.
Please go back and try again.
<input style=\"padding:10px 20px;margin-top:20px;\"
type=button value=\"Back\" onClick=\"history.go(-1)\">";
exit();
}
每个 $appointment_...
都是选择选项 . 我只是想要选择至少一个选择选项,但似乎无论如何都无法提交 .