// cache images for the nav
if (document.images) { 
  client_off             = new Image();
  client_off.src         = '/images/nav/client_off.gif';
   client_over           = new Image();
   client_over.src       = '/images/nav/client_over.gif';
    client_on            = new Image();
    client_on.src        = '/images/nav/client_on.gif';
  company_off            = new Image();
  company_off.src        = '/images/nav/company_off.gif';
   company_over          = new Image();
   company_over.src      = '/images/nav/company_over.gif';
    company_on           = new Image();
    company_on.src       = '/images/nav/company_on.gif';
  home_off               = new Image();
  home_off.src           = '/images/nav/home_off.gif';
   home_over             = new Image();
   home_over.src         = '/images/nav/home_over.gif';
    home_on              = new Image();
    home_on.src          = '/images/nav/home_on.gif';
  jobs_off               = new Image();
  jobs_off.src           = '/images/nav/jobs_off.gif';
   jobs_over             = new Image();
   jobs_over.src         = '/images/nav/jobs_over.gif';
    jobs_on              = new Image();
    jobs_on.src          = '/images/nav/jobs_on.gif';
  ourapproach_off        = new Image();
  ourapproach_off.src    = '/images/nav/ourapproach_off.gif';
   ourapproach_over      = new Image();
   ourapproach_over.src  = '/images/nav/ourapproach_over.gif';
    ourapproach_on       = new Image();
    ourapproach_on.src   = '/images/nav/ourapproach_on.gif';
}


//change state of an image
function chgImg(imgName, newState) {
   if(document.images){
      imgSrc = eval(imgName + '_' + newState + '.src');
      if (typeof(imgName) == 'string') {
         objString = 'document.' + imgName;
         obj = eval(objString);
         obj.src = imgSrc;
      } else
        if ((typeof(imgName) == 'object') && imgName && imgName.src) {
//      alert(imgName + " becomes " + imgSrc);
      imgName = imgSrc;
      }
   }
}