if (document.images) {
     national_dk = new Image
     national_dk_hover = new Image
     national_eng = new Image
     national_eng_hover = new Image
     national_de = new Image
     national_de_hover = new Image
     national_ru = new Image
     national_ru_hover = new Image
     national_chi = new Image
     national_chi_hover = new Image

     national_dk.src = '../gfx/national_dk.gif'
     national_dk_hover.src = '../gfx/national_dk_hover.gif'
     national_eng.src = '../gfx/national_eng.gif'
     national_eng_hover.src = '../gfx/national_eng_hover.gif'
     national_de.src = '../gfx/national_de.gif'
     national_de_hover.src = '../gfx/national_de_hover.gif'
     national_ru.src = '../gfx/national_ru.gif'
     national_ru_hover.src = '../gfx/national_ru_hover.gif'
     national_chi.src = '../gfx/national_chi.gif'
     national_chi_hover.src = '../gfx/national_chi_hover.gif'
 }