How can I detect DOM ready and add a class without jQuery?

Question

I want to rewrite this line without using jQuery so it can be applied quicker (and before the downloading of the jQuery library). The line is...

$(document).         


        

Answer 1

window.onload = function() {
   var elmt =  document.getElementsByTagName('body');
   if(elmt){
      elmt[0].className = 'javascript';
   }
}

That should do it.

EDIT: Updated to get element by tag name not ID.