title: Call JS function with attributes from another file
body: <p>I have a JS file with a simple function, matching width\heights of divs.
  How can I call this function using attributes from HTML file.</p>
  
  <p>In other words, I want to write a function matchHeight(div1,div2) in an outside file but call it from wherever i want using the divs I want.</p>
  
  <p>The function exists, I just don't know how to call it the way I want.</p>
  
  <p>Sorry if I didn't explain myself clearly.</p>
  
  <p>Thanks.</p>