single checkbox controls some others

[Nodral]

Hi All

 

I've little Javascript kowledge so I'm hoping that some people here will be able to help me.

 

I have a form which contains 37 checkboxes.  Of these, 10 have a class of 'time' and I need one checkbox to tick/untick all 10 of them.

 

I have the following code, but it doesn't work and I get an error of

 

syntax error - checkAll(document.getElementById(

 

Here is my function

 

function checkAll(theForm, cName, status) {
for (i=0,n=theForm.elements.length;i<n;i++)
  if (theForm.elements[i].className.indexOf(cName) !=-1) {
    theForm.elements[i].checked = status;
  }
}

and then the checkboxes are dynamically created with data from a DB as follows.

 

<input type='checkbox' class='time' Name='$i' value='$key'>$value</br>

 

The checkboxes appear correctly in the HTML and with the correct class displayed.

 

Any thoughts?

 

The checkbox must NOT tick every box on the screen, just the ones with a class of "time"

 

[Adam]

The error you're getting would suggest it's an error with the call to checkAll(). Can you post that please?