var uagent,uappVersion,uappName
uappName=navigator.appName
uappVersion=navigator.appVersion
uagent=navigator.userAgent

if ((uagent.substring(25,29) == "MSIE" && uagent.charAt(30) > 3) || (uappName == "Netscape" && uappVersion.substring(0,3) > 3))

{

img1off= new Image;
img1off.src="images/nav/nav_home.gif";
img2off= new Image;
img2off.src="images/nav/nav_about.gif";
img3off= new Image;
img3off.src="images/nav/nav_students.gif";
img4off= new Image;
img4off.src="images/nav/nav_join.gif";
img5off= new Image;
img5off.src="images/nav/nav_ecalendar.gif";
img6off= new Image;
img6off.src="images/nav/nav_news.gif";
img7off= new Image;
img7off.src="images/nav/nav_success.gif";
img8off= new Image;
img8off.src="images/nav/nav_community.gif";
img9off= new Image;
img9off.src="images/nav/nav_contactus.gif";

imgaoff= new Image;
imgaoff.src="images/nav/devbox_alumni.jpg";
imgboff= new Image;
imgboff.src="images/nav/devbox_academic.jpg";
imgcoff= new Image;
imgcoff.src="images/nav/devbox_professional.jpg";
imgdoff= new Image;
imgdoff.src="images/nav/devbox_personal.jpg";




img1on= new Image;
img1on.src="images/nav/nav_home2.gif";
img2on= new Image;
img2on.src="images/nav/nav_about2.gif";
img3on= new Image;
img3on.src="images/nav/nav_students2.gif";
img4on= new Image;
img4on.src="images/nav/nav_join2.gif";
img5on= new Image;
img5on.src="images/nav/nav_ecalendar2.gif";
img6on= new Image;
img6on.src="images/nav/nav_news2.gif";
img7on= new Image;
img7on.src="images/nav/nav_success2.gif";
img8on= new Image;
img8on.src="images/nav/nav_community2.gif";
img9on= new Image;
img9on.src="images/nav/nav_contactus2.gif";

imgaon= new Image;
imgaon.src="images/nav/devbox_alumni2.jpg";
imgbon= new Image;
imgbon.src="images/nav/devbox_academic2.jpg";
imgcon= new Image;
imgcon.src="images/nav/devbox_professional2.jpg";
imgdon= new Image;
imgdon.src="images/nav/devbox_personal2.jpg";



}

function active(imgName){

if ((uagent.substring(25,29) == "MSIE" && uagent.charAt(30) > 3) || (uappName == "Netscape" && uappVersion.substring(0,3) > 3)){

document[imgName].src = eval(imgName + "on.src");

}
}

function inActive(imgName){

if ((uagent.substring(25,29) == "MSIE" && uagent.charAt(30) > 3) || (uappName == "Netscape" && uappVersion.substring(0,3) > 3)){

document[imgName].src = eval(imgName + "off.src");

}
}