/*
##################################################
ROLLOVER FUNCTIONALITY
##################################################
*/
image_array_names = new Array();
image_array = new Array();
image_preTag = 'img/';
var array_loaded = false;

image_array_names = ["../img/topnav_about.gif","../img/topnav_about_on.gif",
		     "../img/topnav_center.gif","../img/topnav_center_on.gif",
		     "../img/topnav_research.gif","../img/topnav_research_on.gif",
		     "../img/topnav_news.gif","../img/topnav_news_on.gif",
		     "../img/topnav_doctors.gif","../img/topnav_doctors_on.gif",
				 "../img/topnav_contact.gif","../img/topnav_contact_on.gif",
				 "../img/btn_learnmore.gif","../img/btn_learnmore_on.gif",
				 "../img/btn_readcases.gif","../img/btn_readcases_on.gif"];
					
function preload() {
	for (var i = 0; i < image_array_names.length; i++) {
		image_array[i] = new Image();
		image_array[i] = image_array_names[i];
	}
	array_loaded = true;
}



function image_animate(name,image_no)
{
	if(array_loaded){
		document.images[name].src = image_preTag + image_array[image_no];
	}
}