title: How to select all elements with tag name 'div' but from another html?
body: <p>I want to get all elements with tag 'div' but which are located on external page.
  I understand that for getting innerHTML of each DIV that is located on external page we have jquery load function which allows you to specify an element id to load.
  That's useful but I would like to know how to first find all that divs? 
  If I had just one html file I would use<br>
  <code>var divs= document.getElementsByTagName('div');</code>   but I don't know what to do in this case</p>