Dynamically changing the page background

Hello, I thought this was a very simple problem.  I'm trying to set the various pages of a site with individual background themes.  I want the users to define pick their own them color or image which would be stored in a database, and then dynamically applied via Ajax during runtime.  To test the concept, I started off with this simple script which should set the background color of every page to white,  except for 3 pages which I expect to retain the default background theme as defined in my css file(Default is a color gradient).  Unfortunately, these 3 pages also displayed a white bg, and not the default gradient theme.  Any ideas why? Here is the code.

	<script type='text/javascript'> //Assign page background dynamically


		$(document).ready(function() {


			if((window.location.href !== 'http://url.com/signup.php')||(window.location.href !== 'http://url.com/register.php')||(window.location.href !== 'http://url.com/login.php')){


				$('body').css('background','#fff');

			}

  

		});			



	</script>

In the if statement

if((window.location.href !== 'http://url.com/signup.php')||(window.location.href !== 'http://url.com/register.php')||(window.location.href !== 'http://url.com/login.php'))

i would replace the or (||) with (&&). Im sure this is your problem!

if((window.location.href !== 'http://url.com/signup.php')&&(window.location.href !== 'http://url.com/register.php')&&(window.location.href !== 'http://url.com/login.php')){

Hope that helps.

@jayjay, well i have to use the OR operator and not the AND since I want the condition to be true if either one of those 3 pages is displayed. Anyway, I solved the problem by defining two different css classes, then using the removeClass() function and addClass() to assign the various classes to the pages I want.  Thanks though.