Setting a check box to checked or unchecked in java script

[nascar88]

I want to either check or uncheck a check box using a client side java script. When the user clicks on one check box I want to check another check box on the screen using java script. I am having trouble determining what property needs to be set on the check box.

[Alex]

The syntax is as follows:
getObj("mycheckbox").checked = true;

Where mycheckbox is the id (case-sensitive) of the checkbox.