Solved

What is the checkbox array in the DOM?

Posted on 2004-08-16
3
239 Views
Last Modified: 2011-10-03
I have a form with a couple of listboxes and a lot of checkboxes.  I am looking to make all of these checkboxes unchecked.

i.e.
for (var i=0; i<document.form.checkbox.length; i++)
  {
  document.form.checkbox[i].checked = false;
  }

However, whenever I run this, I get an error that says that document.form.checkbox.length is null or not an object.

The only thing I can think of is that checkbox is not the array in the DOM that I am looking for.

What is the correct syntax for this?

BTW  The checkboxes are not the same name, nor can they be the same name.
0
Comment
Question by:light777
3 Comments
 
LVL 15

Expert Comment

by:justinbillig
ID: 11814680
try this

for( intIndex = 0; intIndex < document.formname.length; intIndex++ )

{

   if( document.formname[ intIndex ].type  == "checkbox" )
   {
      document.formname[ intIndex ].checked = false;
   }
}


or


for( intIndex = 0; intIndex < document.all.length; intIndex++ )

{

     if( document.all( intIndex ).type == "checkbox" )
     {
          document.all( intIndex )checked = false;
      }
}
0
 
LVL 4

Accepted Solution

by:
MrClean21 earned 125 total points
ID: 11814687
Here's a technic to uncheck all checkboxes.

for (var c = 0; c < document.form.elements.length; c++)
   if (document.form.elements[c].type == 'checkbox')
      document.form.elements[c].checked = false;

MrClean
0
 
LVL 1

Author Comment

by:light777
ID: 11814739
Thanks, that works perfectly
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The task A number given should be formatted for easy reading by separating digits into triads. Format must be made inline via JavaScript, i.e., frameworks / functions are not welcome. So let’s take a number like this “12345678.91¿ and format i…
Nothing in an HTTP request can be trusted, including HTTP headers and form data.  A form token is a tool that can be used to guard against request forgeries (CSRF).  This article shows an improved approach to form tokens, making it more difficult to…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question