Javascript checkbox state change

This is going to be straight forward for anyone who un开发者_如何学Cderstands this language.

I have a set of checkboxes, which I am successfully detecting via Javascript on window load.

I now need to detect any change in these checkboxes (ie checked/unchecked) and call in a function to do something else. However using this snippet causes the test function to fire on window load, not onclick, and I don't see why.

//action for county
if (parent != "innerpost") {
county[i].onclick test(name);
}//if  

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You need to write

county[i].onclick = function() { test(name); };