将数据从表单存储到Javascript变量中

Question

I am a newbie when it comes to javascript, I'm playing with different tutorials and trying to make my own simple things to get a better understanding of it all. Today's learning is all about passing parameters through a function. What I would like to do is have a user fill a form in, submit those answers to variables in javascript and then call a function via an onClick event which will then display all the data entered into the form.

Firstly I hope this makes sense and secondly I hope that its the correct use of javascript, Im just trying to get a better understanding of passing params to be honest.

Could anyone advise any resources or point me in the right direction on where to get started with this small project

Answer 1

var data = document.getElementById('id').value;

检查一下： js变量

Answer 2

form elements are select , input , textarea .

On form, add a submit event handler which does the following

Using document.getElementsByTagName method, you can get a array of all such elements in the form.

All these elements have a value property which will return the current value in it. Using this, you can create a string will the current data when form is submitted.

Answer 3

In order to get values from textboxes/textarea/dropdown having unique ID, you can use

document.getElementBtId("IDOFTHECONTROL").value

If the input is DIV/SPAN, use innerHTML

   document.getElementBtId("IDOFTHECONTROL").innerHTML

Answer 4

最简单的方法：

var javascriptvar = document.getElementById('CONTROL_ID').value;