JavaScript Program to Create Text Rollover Effect on TextArea

Write a JavaScript program to create text Rollover effect on TextArea.

Source Code
    <title>JavaScript Roll Over Effects</title>
<textarea rows="2" cols="50" name="rollovertext" onmouseover="this.value='What is rollover?'" onmouseout="this.value='Rollover means  a webpage changes when the user moves his or her mouse over an object on the page'"></textarea>