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_aboutstep.gif";
img3off= new Image;
img3off.src="images/nav/nav_aboutcstep.gif";
img4off= new Image;
img4off.src="images/nav/nav_calendar.gif";
img5off= new Image;
img5off.src="images/nav/nav_stepprograms.gif";
img6off= new Image;
img6off.src="images/nav/nav_cstepprograms.gif";


img1on= new Image;
img1on.src="images/nav/nav_home2.gif";
img2on= new Image;
img2on.src="images/nav/nav_aboutstep2.gif";
img3on= new Image;
img3on.src="images/nav/nav_aboutcstep2.gif";
img4on= new Image;
img4on.src="images/nav/nav_calendar2.gif";
img5on= new Image;
img5on.src="images/nav/nav_stepprograms2.gif";
img6on= new Image;
img6on.src="images/nav/nav_cstepprograms2.gif";


}

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");

}
}