How to select all tag and register onclick event?

Question

I am trying to select all the tags in the page and register onclick even to them.

My codes:

document.getElementsByTag         


        

Answer 1

document.getElementsByTagName('a') returns an array thus try this:

    var arr = document.getElementsByTagName('a');
    for(var key in arr){
      arr[key].onclick = show;
    }

Haven't tested it but it should work