I've looked for answers to this question, but the closest that I could find all had to do with using javascript to create an iframe on a user-owned page. I specifically want to inject javascript into a website via the URL in order to add a frame to Google at the bottom of that website. The syntax which I have been using is as follows:
Javascript: var ifr=document.createElement('iframe');ifr.setAttribute("src","www.Google.com");ifr.width=100+'%';ifr.height=500+'px';document.body.appendChild(ifr); void(0);
Unfortunately, every time that I submit this, the iframe throws a 500 internal server error. Can anybody lend advice as to why this may be happening?