[nikita.mmf]

<label for="input"></label>
<input type="text" id="input" />

(function ( input ) {
	var label, oldValue = '';
	var labels = document.getElementsByTagName("label");
	for ( var j = 0; label = labels[j++]; ) {
		if ( label.getAttribute("for") == input.id ) { break; }
	}
	if ( !label ) { return; }
	
	function handler() {
		if ( input.value != oldValue ) {
			oldValue = value;
			label.innerHTML = "";
			label.appendChild( document.createTextNode( value ) );
		}
	};
	
	if ( input.addEventListener ) {
		input.addEventListener( "keyup", handler, false );
		input.addEventListener( "keydown", handler, false );
	} else if ( input.attachEvent ) {
		input.attachEvent( "onkeyup", handler );
		input.attachEvent( "onkeydown", handler );
	} else {
		input['onkeyup'] = input['onkeydown'] = handler;
	}
	
})( document.getElementById('input') );