if (document.images){
    s_whoweareOff=new Image
    s_servicesOff=new Image
    s_clientsOff=new Image
    s_careersOff=new Image
    s_pressOff=new Image
    s_contact_clientsOff=new Image
    s_whoweareOver=new Image
    s_servicesOver=new Image
    s_clientsOver=new Image
    s_careersOver=new Image
    s_pressOver=new Image
    s_contact_clientsOver=new Image
    casestudiesOff=new Image
    casestudiesOver=new Image
    s_whoweareOff.src="/images/s_whoweare_off.gif"
    s_servicesOff.src="/images/s_services_off.gif"
    s_clientsOff.src="/images/s_clients_off.gif"
    s_careersOff.src="/images/s_careers_off.gif"
    s_pressOff.src="/images/s_press_off.gif"
    s_contact_clientsOff.src="/images/s_contact_clients_off.gif"
    s_whoweareOver.src="/images/s_whoweare_over.gif"
    s_servicesOver.src="/images/s_services_over.gif"
    s_clientsOver.src="/images/s_clients_over.gif"
    s_careersOver.src="/images/s_careers_over.gif"
    s_pressOver.src="/images/s_press_over.gif"
    s_contact_clientsOver.src="/images/s_contact_clients_over.gif"
    casestudiesOff.src="/images/casestudies_off.gif"
    casestudiesOver.src="/images/casestudies_over.gif"

   
    function imgOver(thisImg) {
       if (document[thisImg]){
          document[thisImg].src="/images/"+thisImg + "_over.gif" ;
       } else if(document.layers){
          document.Layer1.document.Layer2.document[thisImg].src="/images/"+thisImg + "_over.gif";
       } else {
          // ERROR
       }
    }

    function imgOut(thisImg) {
       if (document[thisImg]){
          document[thisImg].src="/images/"+thisImg + "_off.gif"
       } else if(document.layers){
          document.Layer1.document.Layer2.document[thisImg].src="/images/"+thisImg + "_off.gif"
       } else {
          // ERROR
       }
    }
  }