if (document.images) {

     img1on = new Image
     img2on = new Image
     img3on = new Image
     img4on = new Image
     img1 = new Image
     img2 = new Image
     img3 = new Image
     img4 = new Image

     img1on.src = "images/archives_r.gif"
     img2on.src = "images/info_r.gif"
     img3on.src = "images/links_r.gif"
     img4on.src = "images/linktog_r.gif"
     img1.src = "images/archives_n.gif"
     img2.src = "images/info_n.gif"
     img3.src = "images/links_n.gif"
     img4.src = "images/linktog_n.gif"

}

else {

     img1on = " "
     img2on = " "
     img3on = " "
     img4on = " "
     img1 = " "
     img2 = " "
     img3 = " "
     img4 = " "     
     document.buttons = " "

}