getElementByName returns Type Error?

Question

My code:

var isSomethingChecked = (document.getElementByName("koalaCheck").checked ||
                          document.getElementByName("kangarooCheck").checked);

Why does this code throw an exception called "Type Error"?

Answer 1

There is no function called getElementByName. what you need is getElementsByName which returns an array of all of the elements that have that name. so you can use:

var isSomethingChecked = (document.getElementsByName("koalaCheck")[0].checked ||    
                         document.getElementsByName("kangarooCheck")[0].checked);