The defaultValue property contains the default value specified by the VALUE attribute of the tag. This property is often used to reset forms to their default values.
<html> <head> <script language="JavaScript"> <!-- function resetForm(){ document.myForm.myText.value = document.myForm.myText.defaultValue; } --> </script> </head> <body> <b>Edit the text in the following text box:</b> <P> <form name="myForm"> <input type=TEXT value="hello world" name="myText"> <input type=BUTTON value="Click to Reset" name="myButton" onClick="resetForm()"> </form> </body> </html>