innerhtml will swap once, but wont swap back

code:

function loadnews()
{
  document.getElementById('newshead').innerHTML = document.getElementById('newshead1').innerHTML;
  document.getElementById('newstext').innerHTML = document.getElementById('newstext1').innerHTML;
  document.getElementById('newsheadsub').innerHTML = document.getElementById('newshead2').innerHTML;
}

function swapnews()
{
  if (document.getElementById('newshead').innerHTML = document.getElementById('newshead1').innerHTML)
  {
    document.getElementById('newshead').innerHTML = document.getElementById('newshead2').innerHTML;
    document.getElementById('newstext').innerHTML = document.getElementById('newstext2').innerHTML;
    document.getElementById('newsheadsub').innerHTML = document.getElementById('newshead1').innerHTML;
  }
  else
  {
    document.getElementById('newshead').innerHTML = document.getElementById('newshead1').innerHTML;
    document.getElementById('newstext').innerHTML = document.getElementById('newstext1').innerHTML;
    document.getElementById('newsheadsub').innerHTML = document.getElementById('newshead2').innerHTML;
  }
}

Code (markup):

the body onload calls the "loadnews" function

im trying to get it so that they can swap back and forth whenever the person clicks on the link containing the "swapnews" function

so far it will only swap once, and wont swap back

 

common error, one i make every now and then too

if (a = b) will SET a TO b, and return true if B wasn't null or undefined.
if (a == b) will do what you want

function loadnews()
.....
function swapnews()
{
  if (document.getElementById('newshead').innerHTML == document.getElementById('newshead1').innerHTML)
  {
.....
}

Code (markup):