// browser sniffer
var isVer3plus;
isVer3plus = false;
browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
// test browser version for 3 plus for JavaScript rollovers
if( browserVer >= 3 ){ isVer3plus = true; }

// preload images for JavaScript rollovers
if (isVer3plus)
{


   imgNav1on = new Image;
   imgNav1on.src = "/images/btn_top_home_hov.gif";
   imgNav1off = new Image;
   imgNav1off.src = "/images/btn_top_home.gif";
      
   imgNav2on = new Image;
   imgNav2on.src = "/images/btn_top_annual_hov.gif";
   imgNav2off = new Image;
   imgNav2off.src = "/images/btn_top_annual.gif";
   
   imgNav3on = new Image;
   imgNav3on.src = "/images/btn_top_pub_hov.gif";
   imgNav3off = new Image;
   imgNav3off.src = "/images/btn_top_pub.gif";
   
   imgNav4on = new Image;
   imgNav4on.src = "/images/btn_top_office_hov.gif";
   imgNav4off = new Image;
   imgNav4off.src = "/images/btn_top_office.gif";
   
   imgNav5on = new Image;
   imgNav5on.src = "/images/btn_top_mem_hov.gif";
   imgNav5off = new Image;
   imgNav5off.src = "/images/btn_top_mem.gif";
   
   imgNav6on = new Image;
   imgNav6on.src = "/images/btn_top_contact_hov.gif";
   imgNav6off = new Image;
   imgNav6off.src = "/images/btn_top_contact.gif";
   
   
   
   
   imgNav11on = new Image;
   imgNav11on.src = "/images/btn_psp/back_hov.gif";
   imgNav11off = new Image;
   imgNav11off.src = "/images/btn_psp/back.gif";
   
   imgNav12on = new Image;
   imgNav12on.src = "/images/btn_psp/supplemental_hov.gif";
   imgNav12off = new Image;
   imgNav12off.src = "/images/btn_psp/supplemental.gif";
   
   imgNav13on = new Image;
   imgNav13on.src = "/images/btn_psp/press_hov.gif";
   imgNav13off = new Image;
   imgNav13off.src = "/images/btn_psp/press.gif";
   
   imgNav14on = new Image;
   imgNav14on.src = "/images/btn_psp/authors_hov.gif";
   imgNav14off = new Image;
   imgNav14off.src = "/images/btn_psp/authors.gif";
   
   imgNav15on = new Image;
   imgNav15on.src = "/images/btn_psp/permissions_hov.gif";
   imgNav15off = new Image;
   imgNav15off.src = "/images/btn_psp/permissions.gif";
   
   imgNav16on = new Image;
   imgNav16on.src = "/images/btn_psp/subscriptions_hov.gif";
   imgNav16off = new Image;
   imgNav16off.src = "/images/btn_psp/subscriptions.gif";
   
   imgNav17on = new Image;
   imgNav17on.src = "/images/btn_psp/pubsoff_hov.gif";
   imgNav17off = new Image;
   imgNav17off.src = "/images/btn_psp/pubsoff.gif";
   
   
   
   imgNav25on = new Image;
   imgNav25on.src = "/images/btn_announcements_hov.gif";
   imgNav25off = new Image;
   imgNav25off.src = "/images/btn_announcements.gif";
   
   imgNav26on = new Image;
   imgNav26on.src = "/images/btn_membership_hov.gif";
   imgNav26off = new Image;
   imgNav26off.src = "/images/btn_membership.gif";
   
   imgNav27on = new Image;
   imgNav27on.src = "/images/btn_pubs_office_hov.gif";
   imgNav27off = new Image;
   imgNav27off.src = "/images/btn_pubs_office.gif";
}
//ImgOn(imgName)
//DISPLAY THE ON IMAGE
function ImgOn(imgName) {
  	if (isVer3plus) {
		document[imgName].src = eval(imgName + "on.src");
  	}
}
//ImgOff(imgName)
//DISPLAY THE OFF IMAGE
function ImgOff(imgName) {
  	if (isVer3plus) {
   	document[imgName].src = eval(imgName + "off.src");
  	}
}