navimg1 = new Image();
	navimg1.src = "images/nav_education_on.gif";
	navimg2 = new Image();
	navimg2.src = "images/nav_care_on.gif";
	navimg3 = new Image();
	navimg3.src = "images/nav_research_on.gif";
	navimg4 = new Image();
	navimg4.src = "images/nav_aboutus_on.gif";
	navimg5 = new Image();
	navimg5.src = "images/nav_contactus_on.gif";