Question

Just like when you ask a question on this website, as you type the title in the tab changes to whatever you have typed in the question box. How do you access this?

Answer 1

Quick’n’dirty:

document.title = prompt('sup bro ?');

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If you don’t want a modal input dialog, you need to catch some events for any <input> box.

document.getElementById('inputBoxId').addEventListener('keypress', function( event ) {
    if( event.keyCode === 13 ) {  // return ?
        document.title = this.value;
    }
}, false);

^{addEventListener needs to get replaced by attachEvent for IE<9}