<html> <body> <script language="JavaScript"> function function1() { var m = document.getElementById("myP").firstChild; var myText = " (The replacement text) "; m.replaceData(12, 9, myText); } </script> <p id="myP">This is the reference text node.</p> <input type = "button" value = 'Replace the word "reference"' onclick="function1();"> </body> </html>