// Nav rollover
		nav_homeOff = new Image(); 
		nav_homeOff.src="/images/globalnav/nav_home_off.gif";
		nav_homeOn = new Image(); 
		nav_homeOn.src="/images/globalnav/nav_home_on.gif";
		nav_homeOver = new Image(); 
		nav_homeOver.src="/images/globalnav/nav_home_over.gif";
		
		nav_whyOff = new Image(); 
		nav_whyOff.src="/images/globalnav/nav_whyprevahealth_off.gif";
		nav_whyOn = new Image(); 
		nav_whyOn.src="/images/globalnav/nav_whyprevahealth_on.gif";
		nav_whyOver = new Image(); 
		nav_whyOver.src="/images/globalnav/nav_whyprevahealth_over.gif";
		
		nav_servicesOff = new Image(); 
		nav_servicesOff.src="/images/globalnav/nav_servicesoffered_off.gif";
		nav_servicesOn = new Image(); 
		nav_servicesOn.src="/images/globalnav/nav_servicesoffered_on.gif";
		nav_servicesOver = new Image(); 
		nav_servicesOver.src="/images/globalnav/nav_servicesoffered_over.gif";
		
		nav_healthyOff = new Image(); 
		nav_healthyOff.src="/images/globalnav/nav_healthyliving_off.gif";
		nav_healthyOn = new Image(); 
		nav_healthyOn.src="/images/globalnav/nav_healthyliving_on.gif";
		nav_healthyOver = new Image(); 
		nav_healthyOver.src="/images/globalnav/nav_healthyliving_over.gif";
		
		nav_newsOff = new Image(); 
		nav_newsOff.src="/images/globalnav/nav_news_pr_off.gif";
		nav_newsOn = new Image(); 
		nav_newsOn.src="/images/globalnav/nav_news_pr_on.gif";
		nav_newsOver = new Image(); 
		nav_newsOver.src="/images/globalnav/nav_news_pr_over.gif";
		
		nav_clinicalOff = new Image(); 
		nav_clinicalOff.src="/images/globalnav/nav_clinical_data_off.gif";
		nav_clinicalOn = new Image(); 
		nav_clinicalOn.src="/images/globalnav/nav_clinical_data_on.gif";
		nav_clinicalOver = new Image(); 
		nav_clinicalOver.src="/images/globalnav/nav_clinical_data_over.gif";
		
		nav_faqOff = new Image(); 
		nav_faqOff.src="/images/globalnav/nav_faq_off.gif";
		nav_faqOn = new Image(); 
		nav_faqOn.src="/images/globalnav/nav_faq_on.gif";
		nav_faqOver = new Image(); 
		nav_faqOver.src="/images/globalnav/nav_faq_over.gif";
		
		nav_contactOff = new Image(); 
		nav_contactOff.src="/images/globalnav/nav_contactus_off.gif";
		nav_contactOn = new Image(); 
		nav_contactOn.src="/images/globalnav/nav_contactus_on.gif";
		nav_contactOver = new Image(); 
		nav_contactOver.src="/images/globalnav/nav_contactus_over.gif";
		
		function turnOn(imagename)
		{		
			document[imagename].src = eval(imagename + 'On.src');
		}

		function turnOff(imagename)
		{		
			document[imagename].src = eval(imagename + 'Off.src');
		}
		
		function turnOver(imagename)
		{		
			document[imagename].src = eval(imagename + 'Over.src');
		}