// The following code is for rollover buttons  


function preload(imgObj,imgSrc) {


		eval(imgObj+' = new Image()')
		
		eval(imgObj+'.src = "'+imgSrc+'"')
		
		
}


//____Preload Images_____

//main navigation     

preload('nav_01_off','../images/buttons/navigation/07_home_off.gif');
preload('nav_01_on','../images/buttons/navigation/07_home_on.gif');

preload('nav_02_off','../images/buttons/navigation/08_about_ndc_off.gif');
preload('nav_02_on','../images/buttons/navigation/08_about_ndc_on.gif');

preload('nav_03_off','../images/buttons/navigation/09_prevention_off.gif');
preload('nav_03_on','../images/buttons/navigation/09_prevention_on.gif');

preload('nav_04_off','../images/buttons/navigation/10_early_detection_off.gif');
preload('nav_04_on','../images/buttons/navigation/10_early_detection_on.gif');

preload('nav_05_off','../images/buttons/navigation/11_treatment_off.gif');
preload('nav_05_on','../images/buttons/navigation/11_treatment_on.gif');

preload('nav_06_off','../images/buttons/navigation/12_clinical_trials_off.gif');
preload('nav_06_on','../images/buttons/navigation/12_clinical_trials_on.gif');

preload('nav_07_off','../images/buttons/navigation/13_types_of_cancer_off.gif');
preload('nav_07_on','../images/buttons/navigation/13_types_of_cancer_on.gif');

preload('nav_08_off','../images/buttons/02_sitemap_off.gif');
preload('nav_08_on','../images/buttons/02_sitemap_on.gif');

preload('nav_09_off','../images/buttons/04_search_off.gif');
preload('nav_09_on','../images/buttons/04_search_on.gif');

preload('nav_10_off','../images/buttons/home/18_calendar_of_events_off.gif');
preload('nav_10_on','../images/buttons/home/18_calendar_of_events_on.gif');

preload('nav_11_off','../images/buttons/home/23_news_flash_off.gif');
preload('nav_11_on','../images/buttons/home/23_news_flash_on.gif');


function changeImage(imgName,imgObj) {

	if (document.images) {

	document.images[imgName].src = eval(imgObj+".src");
		
	}	
		
}

//-->