<!--This Script was found at John's World.-->
<!--To find this script and many more just go to-->
<!--http://www.johnsworld.com/javascript-->
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function test(form) {
if (form.text.value == "")
alert("What\'s your favorite color?")
else {
document.bgColor=(""+form.text.value+"");
}
}
// End -->
</SCRIPT>
Now add this to your body tags:
<CENTER>
<FORM>
<B>Please enter your favorite<BR>
color and then click the button.</b><BR>
<input type="text" name="text">
<input type="button" name="button" value="click for color!" onClick="test(this.form)">
</FORM>
</CENTER>