Question

I’m working on a .NET-powered questionnaire which contains several repeater controls, each row of which contains three radiobuttons. I’m trying to write a simple Javascript function to check all the controls on the page which contain the word ‘chkGreen’ in the control name/id.

The page looks something like this:

Repeater 1 Description 1           ( ) Green ( ) Yellow ( ) Red Description 2           ( ) Green ( ) Yellow ( ) Red Description 3           ( ) Green ( ) Yellow ( ) Red  Repeater 2 Description 1           ( ) Green ( ) Yellow ( ) Red Description 2           ( ) Green ( ) Yellow ( ) Red Description 3           ( ) Green ( ) Yellow ( ) Red 

Here’s the function so far:

   for (i = 0; i < document.Form1.elements.length; i++) {       var _control = document.Form1.elements[i].id       if (_control.indexOf('chkGreen') > 0) {          eval(_control.checked = true);       }    } 

This function does not work. When I add a document.write or alert() to the statement, it properly fires, so the logic is apparently working, it’s just the actual radiobutton check code is not working.

Any thoughts?

Answer 1

You don’t need to eval the _control.checked line.

for (i = 0; i < document.Form1.elements.length; i++) {   var _control = document.Form1.elements[i]; // EDIT: you want the element, not the id of the element   if (_control.indexOf('chkGreen') > 0) {      _control.checked = true;   } }