//Buttons preload/swap
 if (document.images) {
 var brochure_on =new Image();  brochure_on.src ="/sites/all/themes/custom/nas/img/home/btns/btn_brochure_ovr.jpg"; 
 var brochure_off=new Image();  brochure_off.src="/sites/all/themes/custom/nas/img/home/btns/btn_brochure.jpg"; 
 var calendar_on =new Image();  calendar_on.src ="/sites/all/themes/custom/nas/img/home/btns/btn_calendar_ovr.jpg"; 
 var calendar_off=new Image();  calendar_off.src="/sites/all/themes/custom/nas/img/home/btns/btn_calendar.jpg"; 
  var facebook_on =new Image();  facebook_on.src ="/sites/all/themes/custom/nas/img/snets/facebook_ovr.gif"; 
 var facebook_off=new Image();  facebook_off.src="/sites/all/themes/custom/nas/img/snets/facebook.gif"; 
 var twitter_on =new Image();  twitter_on.src ="/sites/all/themes/custom/nas/img/snets/twitter_ovr.gif"; 
 var twitter_off=new Image();  twitter_off.src="/sites/all/themes/custom/nas/img/snets/twitter.gif"; 
 var linkedin_on =new Image();  linkedin_on.src ="/sites/all/themes/custom/nas/img/snets/linkedin_ovr.gif"; 
 var linkedin_off=new Image();  linkedin_off.src="/sites/all/themes/custom/nas/img/snets/linkedin.gif"; 
 var youtube_on =new Image();  youtube_on.src ="/sites/all/themes/custom/nas/img/snets/youtube_ovr.gif"; 
 var youtube_off=new Image();  youtube_off.src="/sites/all/themes/custom/nas/img/snets/youtube.gif"; 
}

function handleOver(imgid) { 
 var imgon = imgid + "_on";
 if (document.images) document[imgid].src= this[imgon].src;
}

function handleOut(imgid) {
var imgoff = imgid + "_off";
 if (document.images) document[imgid].src= this[imgoff].src;
}