Value Range Script (Part 2)

Question

How can I, within the below script, allow for the value to be left blank or enter 0 and not get an error for the value range set? I only want users to either enter a value within that range or, if left blank or the field is equal to zero, they will not be prompted to enter a value within the specified range.
if((event.value >= .25) && (event.value <= 1.75)){
//Valid
} else {
app.alert("ERROR: Please choose a value within .25 and 1.75.", 3);
event.rc = false; 
Thanks to all in advance!

Answer 1

Thank you much, as always, Try67!
From:   try67 <[email protected]>
To:     Omar Lopez Nunez <[email protected]>
Date:   08/10/2011 11:18 AM
Subject:        Value Range Script (Part 2)
(There's no need to open a new thread....)
Replace the first line with this:
if(event.value=="" || event.value == 0 || (event.value >= .25) &&
(event.value <= 1.75)){