Javascript Examples :: View topic

scorpioy · 30 Jun 2004

In my previous post, I asked how to check all rows' checkbox in a table if the first row's checkbox is checked, and I got the correct code for doing that. In the following code, book_click_all is the first row's checkbox name and check_book is the rest rows' checkbox name.

Now due to my application's other restriction, I have to change all names from check_book to check_book[]. Then the code below no longer works.
Is it possible to change the code somewhere in order to make it work if I have to have the name changed?

Thanks a lot.

Code:

function checkAll()
{
if(document.all.book_click_all.checked)
for(var i=0;i<document.book.check_book.length;i++)
document.book.check_book[i].checked=true;
else
for(var i=0;i<document.book.check_book.length;i++)
document.book.check_book[i].checked=false;

}

mike · 30 Apr 2000

if you pass the name of the form checkbox variable:
function checkAll(_item)

then you can change the hardcoded references to check_book as follows using the eval function

WAS
document.book.check_book[i].checked=true;

IS
eval("document.book."+_item+"[i].checked=true;");