问题描述
对于我的学校工作,我必须在表单中添加一组单选按钮以接受GCSE,AS或A2等条目。然后,我必须编写一个javascript函数,在警告框中显示用户的输入级别,以便可以确认或拒绝该级别。到目前为止,我已经完成了单选按钮,但不知道如何执行该功能。
For my school work I have to add a set of radio buttons to the form to accept a level of entry such as GCSE, AS or A2. Then I have to write a javascript function that displays the level of entry to the user in an alert box so that the level can be confirmed or rejected. So far I have done the radio buttons but don't know how to do the function.
继承人我的代码到目前为止:
Heres my code so far: http://jsbin.com/hibutazide/1/edit?html,js,output
推荐答案
您可以为每个单选按钮赋予不同的id,然后在javascript中使用 checked
属性。
you could give different id to every radio button, and then use checked
property of them in javascript.
if(!document.getElementById('r1').checked &&
!document.getElementById('r2').checked &&
!document.getElementById('r3').checked){
alert("you must choose a radio button");
}
这篇关于使用警报框验证单选按钮,以便它可以被接受或拒绝的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!