function preloadImage(src){
var img=new Image();img.src=src
return img
}
function getImage(name,parent){
var index=0
function findImage(n,d){
var o=(d.getElementsByTagName&&d.getElementsByTagName("IMG")[n]||d.all&&d.all.tags('img')[n]||d.images[typeof(n)=='number'?n-index:n])
if(o)return o
if(document.layers){
index+=d.images.length
for(var i=0;i<d.layers.length;i++){
var r=findImage(n,d.layers[i].document)
if(r)return r
}
}
return null
}
return findImage(name,parent?(document.layers?parent.document:parent):document)
}
function setImage(name,src){
var o=getImage(name)
if(o==null)return false
o.src=src
return true
}