Edit in JSFiddle

Result
JavaScript
HTML

//onchange
function funName1(id) {
    $("#chgtxt").text($("#txt1").val());
}
	
//onkeyup
function funName2(id) {
    $("#chgtxt").text($("#txt2").val());
}

<body>  
	<p>Result:<span id="chgtxt">Text</span></p>
	<p><!--onChange: change the Text content dynamically-->
		onChange:<input type="text" id="txt1" onChange="funName1(this.id);"/>
	</p>
	<p>--Similar example--</p>
	<p><!--onKeyUp: change the Text content dynamically and word by word -->
		onKeyUp:&nbsp;&nbsp;<input type="text" id="txt2" onKeyUp="funName2(this.id);"/>
	</p>
</body>