if (document.images) {

  //contact us button
  img1off = new Image();
  img1off.src = "img/all_contactus_off.gif";

  //home page navigation
  img2off = new Image();
  img2off.src = "img/hm_nav_phl_off.gif";
  img3off = new Image();
  img3off.src = "img/hm_nav_apr_off.gif";
  img4off = new Image();
  img4off.src = "img/hm_nav_srv_off.gif";
  img5off = new Image();
  img5off.src = "img/hm_nav_team_off.gif";
  img6off = new Image();
  img6off.src = "img/hm_nav_case_off.gif";
  img7off = new Image();
  img7off.src = "img/hm_nav_res_off.gif";

  //philosophy page navigation
  img8off = new Image();
  img8off.src = "img/phl_nav_hm_off.gif";
  img9off = new Image();
  img9off.src = "img/phl_nav_apr_off.gif";
  img10off = new Image();
  img10off.src = "img/phl_nav_srv_off.gif";
  img11off = new Image();
  img11off.src = "img/phl_nav_team_off.gif";
  img12off = new Image();
  img12off.src = "img/phl_nav_case_off.gif";
  img13off = new Image();
  img13off.src = "img/phl_nav_res_off.gif";

  //approach page navigation
  img14off = new Image();
  img14off.src = "img/apr_nav_hm_off.gif";
  img15off = new Image();
  img15off.src = "img/apr_nav_phl_off.gif";
  img16off = new Image();
  img16off.src = "img/apr_nav_srv_off.gif";
  img17off = new Image();
  img17off.src = "img/apr_nav_team_off.gif";
  img18off = new Image();
  img18off.src = "img/apr_nav_case_off.gif";
  img19off = new Image();
  img19off.src = "img/apr_nav_res_off.gif";

  //services page navigation
  img20off = new Image();
  img20off.src = "img/srv_nav_hm_off.gif";
  img21off = new Image();
  img21off.src = "img/srv_nav_phl_off.gif";
  img22off = new Image();
  img22off.src = "img/srv_nav_apr_off.gif";
  img23off = new Image();
  img23off.src = "img/srv_nav_team_off.gif";
  img24off = new Image();
  img24off.src = "img/srv_nav_case_off.gif";
  img25off = new Image();
  img25off.src = "img/srv_nav_res_off.gif";

  //team page navigation
  img26off = new Image();
  img26off.src = "img/team_nav_hm_off.gif";
  img27off = new Image();
  img27off.src = "img/team_nav_phl_off.gif";
  img28off = new Image();
  img28off.src = "img/team_nav_apr_off.gif";
  img29off = new Image();
  img29off.src = "img/team_nav_srv_off.gif";
  img30off = new Image();
  img30off.src = "img/team_nav_case_off.gif";
  img31off = new Image();
  img31off.src = "img/team_nav_res_off.gif";

  //casestudy page navigation
  img32off = new Image();
  img32off.src = "img/case_nav_hm_off.gif";
  img33off = new Image();
  img33off.src = "img/case_nav_phl_off.gif";
  img34off = new Image();
  img34off.src = "img/case_nav_apr_off.gif";
  img35off = new Image();
  img35off.src = "img/case_nav_srv_off.gif";
  img36off = new Image();
  img36off.src = "img/case_nav_team_off.gif";
  img37off = new Image();
  img37off.src = "img/case_nav_res_off.gif";

  //resources page navigation
  img38off = new Image();
  img38off.src = "img/res_nav_hm_off.gif";
  img39off = new Image();
  img39off.src = "img/res_nav_phl_off.gif";
  img40off = new Image();
  img40off.src = "img/res_nav_apr_off.gif";
  img41off = new Image();
  img41off.src = "img/res_nav_srv_off.gif";
  img42off = new Image();
  img42off.src = "img/res_nav_team_off.gif";
  img43off = new Image();
  img43off.src = "img/res_nav_case_off.gif";

  //contact page navigation
  img44off = new Image();
  img44off.src = "img/contactus_nav_hm_off.gif";
  img45off = new Image();
  img45off.src = "img/contactus_nav_phl_off.gif";
  img46off = new Image();
  img46off.src = "img/contactus_nav_apr_off.gif";
  img47off = new Image();
  img47off.src = "img/contactus_nav_srv_off.gif";
  img48off = new Image();
  img48off.src = "img/contactus_nav_team_off.gif";
  img49off = new Image();
  img49off.src = "img/contactus_nav_case_off.gif";
  img50off = new Image();
  img50off.src = "img/contactus_nav_res_off.gif";

  //services
  img51off = new Image();
  img51off.src = "img/srv_menu1_market_off.gif";
  img52off = new Image();
  img52off.src = "img/srv_menu2_strategic_off.gif";
  img53off = new Image();
  img53off.src = "img/srv_menu3_comm_off.gif";
  img54off = new Image();
  img54off.src = "img/srv_menu4_marketaction_off.gif";
  img55off = new Image();
  img55off.src = "img/srv_menu5_bus_off.gif";
  img56off = new Image();
  img56off.src = "img/srv_menu6_www_off.gif";
  img57off = new Image();
  img57off.src = "img/srv_menu7_roi_off.gif";

  //***************************************************

  //contact us button
  img1on = new Image();
  img1on.src = "img/all_contactus_on.gif";

  //home page navigation
  img2on = new Image();
  img2on.src = "img/hm_nav_phl_on.gif";
  img3on = new Image();
  img3on.src = "img/hm_nav_apr_on.gif";
  img4on = new Image();
  img4on.src = "img/hm_nav_srv_on.gif";
  img5on = new Image();
  img5on.src = "img/hm_nav_team_on.gif";
  img6on = new Image();
  img6on.src = "img/hm_nav_case_on.gif";
  img7on = new Image();
  img7on.src = "img/hm_nav_res_on.gif";

  //philosophy page navigation
  img8on = new Image();
  img8on.src = "img/phl_nav_hm_on.gif";
  img9on = new Image();
  img9on.src = "img/phl_nav_apr_on.gif";
  img10on = new Image();
  img10on.src = "img/phl_nav_srv_on.gif";
  img11on = new Image();
  img11on.src = "img/phl_nav_team_on.gif";
  img12on = new Image();
  img12on.src = "img/phl_nav_case_on.gif";
  img13on = new Image();
  img13on.src = "img/phl_nav_res_on.gif";

  //approach page navigation
  img14on = new Image();
  img14on.src = "img/apr_nav_hm_on.gif";
  img15on = new Image();
  img15on.src = "img/apr_nav_phl_on.gif";
  img16on = new Image();
  img16on.src = "img/apr_nav_srv_on.gif";
  img17on = new Image();
  img17on.src = "img/apr_nav_team_on.gif";
  img18on = new Image();
  img18on.src = "img/apr_nav_case_on.gif";
  img19on = new Image();
  img19on.src = "img/apr_nav_res_on.gif";

  //approach page navigation
  img20on = new Image();
  img20on.src = "img/srv_nav_hm_on.gif";
  img21on = new Image();
  img21on.src = "img/srv_nav_phl_on.gif";
  img22on = new Image();
  img22on.src = "img/srv_nav_apr_on.gif";
  img23on = new Image();
  img23on.src = "img/srv_nav_team_on.gif";
  img24on = new Image();
  img24on.src = "img/srv_nav_case_on.gif";
  img25on = new Image();
  img25on.src = "img/srv_nav_res_on.gif";

  //team page navigation
  img26on = new Image();
  img26on.src = "img/team_nav_hm_on.gif";
  img27on = new Image();
  img27on.src = "img/team_nav_phl_on.gif";
  img28on = new Image();
  img28on.src = "img/team_nav_apr_on.gif";
  img29on = new Image();
  img29on.src = "img/team_nav_srv_on.gif";
  img30on = new Image();
  img30on.src = "img/team_nav_case_on.gif";
  img31on = new Image();
  img31on.src = "img/team_nav_res_on.gif";

  //casestudy page navigation
  img32on = new Image();
  img32on.src = "img/case_nav_hm_on.gif";
  img33on = new Image();
  img33on.src = "img/case_nav_phl_on.gif";
  img34on = new Image();
  img34on.src = "img/case_nav_apr_on.gif";
  img35on = new Image();
  img35on.src = "img/case_nav_srv_on.gif";
  img36on = new Image();
  img36on.src = "img/case_nav_team_on.gif";
  img37on = new Image();
  img37on.src = "img/case_nav_res_on.gif";

  //resources page navigation
  img38on = new Image();
  img38on.src = "img/res_nav_hm_on.gif";
  img39on = new Image();
  img39on.src = "img/res_nav_phl_on.gif";
  img40on = new Image();
  img40on.src = "img/res_nav_apr_on.gif";
  img41on = new Image();
  img41on.src = "img/res_nav_srv_on.gif";
  img42on = new Image();
  img42on.src = "img/res_nav_team_on.gif";
  img43on = new Image();
  img43on.src = "img/res_nav_case_on.gif";

  //contact page navigation
  img44on = new Image();
  img44on.src = "img/contactus_nav_hm_on.gif";
  img45on = new Image();
  img45on.src = "img/contactus_nav_phl_on.gif";
  img46on = new Image();
  img46on.src = "img/contactus_nav_apr_on.gif";
  img47on = new Image();
  img47on.src = "img/contactus_nav_srv_on.gif";
  img48on = new Image();
  img48on.src = "img/contactus_nav_team_on.gif";
  img49on = new Image();
  img49on.src = "img/contactus_nav_case_on.gif";
  img50on = new Image();
  img50on.src = "img/contactus_nav_res_on.gif";

  //
  img51on = new Image();
  img51on.src = "img/srv_menu1_market_on.gif";
  img52on = new Image();
  img52on.src = "img/srv_menu2_strategic_on.gif";
  img53on = new Image();
  img53on.src = "img/srv_menu3_comm_on.gif";
  img54on = new Image();
  img54on.src = "img/srv_menu4_marketaction_on.gif";
  img55on = new Image();
  img55on.src = "img/srv_menu5_bus_on.gif";
  img56on = new Image();
  img56on.src = "img/srv_menu6_www_on.gif";
  img57on = new Image();
  img57on.src = "img/srv_menu7_roi_on.gif";

}

// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}


// function to open a page in a new browser
function openWindow(url) {
	window.open(url,'800x600',
      'toolbar=yes,status=yes,scrollbars=yes,location=yes,menubar=yes,directories=yes,width=800,height=600')
}


// function to open a page in a new browser
function openPopup(url) {
	window.open(url,'800x600',
      'toolbar=no,status=no,scrollbars=no,location=no,menubar=no,directories=no,width=400,height=475')
}