var preloadFlag=false
var __page_popup_images = {};
function loadImage(name, src) {
  __page_popup_images[name] = new Image()
  __page_popup_images[name].src = src
}

function changeImage(dpic, pic) {
  if (document.images && (preloadFlag == true))
    document.images[dpic].src=__page_popup_images[pic].src
}

function enable(what) {
    changeImage(what, what+'_')
}

function disable(what) {
    changeImage(what, what)
}

var isNetscape=false
var isNS4=false
if (navigator.appName == "Netscape") {
    isNetscape=true
    if (navigator.product!='Gecko') {
        isNS4=true
    }else{
        isNS4=false
        document.all=document.getElementsByTagName("*")
    }
}else{
    isNetscape=false
    isNS4=false
}