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_dos.gif";
img5off= new Image;
img5off.src="images/nav/nav_calendar.gif";
img6off= new Image;
img6off.src="images/nav/nav_stepalumni.gif";
img7off= new Image;
img7off.src="images/nav/nav_cstepalumni.gif";
img8off= new Image;
img8off.src="images/nav/nav_siaportal.gif";

//Tools
/*imgt1off= new Image;
imgt1off.src="images/nav/tools/homework_nav.gif";
imgt2off= new Image;
imgt2off.src="images/nav/tools/professionalorg_nav.gif";
imgt3off= new Image;
imgt3off.src="images/nav/tools/professionalres_nav.gif";
*/


//Conferences
imgcon0off= new Image;
imgcon0off.src="images/nav/conferences/csconferencehome_nav.gif";
imgcon1off= new Image;
imgcon1off.src="images/nav/conferences/posterabstracts_nav.gif";
imgcon2off= new Image;
imgcon2off.src="images/nav/conferences/oralabstracts_nav.gif";
imgcon3off= new Image;
imgcon3off.src="images/nav/conferences/workshopdetails_nav.gif";
imgcon4off= new Image;
imgcon4off.src="images/nav/conferences/keynotebios_nav.gif";
imgcon5off= new Image;
imgcon5off.src="images/nav/conferences/schedule_nav.gif";
imgcon6off= new Image;
imgcon6off.src="images/nav/conferences/committee_nav.gif";
imgcon7off= new Image;
imgcon7off.src="images/nav/conferences/sconferencehome_nav.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_dos2.gif";
img5on= new Image;
img5on.src="images/nav/nav_calendar2.gif";
img6on= new Image;
img6on.src="images/nav/nav_stepalumni2.gif";
img7on= new Image;
img7on.src="images/nav/nav_cstepalumni2.gif";
img8on= new Image;
img8on.src="images/nav/nav_siaportal2.gif";

//Tools
/*imgt1on= new Image;
imgt1on.src="images/nav/tools/homework_nav2.gif";
imgt2on= new Image;
imgt2on.src="images/nav/tools/professionalorg_nav2.gif";
imgt3on= new Image;
imgt3on.src="images/nav/tools/professionalres_nav2.gif";
*/


//Conferences
imgcon0on= new Image;
imgcon0on.src="images/nav/conferences/conferencehome_nav2.gif";
imgcon1on= new Image;
imgcon1on.src="images/nav/conferences/posterabstracts_nav2.gif";
imgcon2on= new Image;
imgcon2on.src="images/nav/conferences/oralabstracts_nav2.gif";
imgcon3on= new Image;
imgcon3on.src="images/nav/conferences/workshopdetails_nav2.gif";
imgcon4on= new Image;
imgcon4on.src="images/nav/conferences/keynotebios_nav2.gif";
imgcon5on= new Image;
imgcon5on.src="images/nav/conferences/schedule_nav2.gif";
imgcon6on= new Image;
imgcon6on.src="images/nav/conferences/committee_nav2.gif";
imgcon7on= new Image;
imgcon7on.src="images/nav/conferences/sconferencehome_nav2.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");

}
}