$(document).ready(function() {
				
				if (document.images)
				{ 					  				  				  				  				  				  				  
				  					
				  img1=new Image(); 
				  img1.src="images/nav/bg-home-on.gif"; 
				  img2=new Image(); 
				  img2.src="images/nav/bg-profile-on.gif"; 
				  img3=new Image(); 
				  img3.src="images/nav/bg-profile-green.png"; 
				  img4=new Image(); 
				  img4.src="images/nav/bg-projects-on.gif"; 
				  img5=new Image(); 
				  img5.src="images/nav/bg-projects-green.png"; 
				  img6=new Image(); 
				  img6.src="images/nav/bg-press-awards-on.gif"; 
				  img7=new Image(); 
				  img7.src="images/nav/bg-press-awards-green.png"; 	
				  img8=new Image(); 
				  img8.src="images/nav/bg-contact-on.gif"; 		
				  img9=new Image(); 
				  img9.src="images/nav/bg-contact-green.png"; 
				  img10=new Image(); 
				  img10.src="images/nav/bg-download-on.gif"; 		
				  img11=new Image(); 
				  img11.src="images/nav/bg-download-green.png"; 				  			  					  		  			  
				  				  
				}
				
			});