Cannot set property 'innerHTML' of null
/* Answer to: "Cannot set property 'innerHTML' of null" */
// Make sure the <script> tag, containing the javascript is at the
// bottom of the <body> tag.
// As long as the <script> tag is below the element it's trying to
// find, the JavaScript should work.
// However, if you don't want to be the <script> at the bottom of
// your <body> tag. Wrap your javascript with:
window.onload = function (){
...
}