var ie=document.all
 var dom=document.getElementById
 var ns4=document.layers
 var calunits=document.layers? "" : "px"

var bouncelimit=32 //(must be divisible by 8)
 var direction="up"

function initbox(){
 if (!dom&&!ie&&!ns4)
 return
 crossobj=(dom)?document.getElementById("dropin").style : ie? document.all.dropin  : document.dropin
 scroll_top=(ie)? truebody().scrollTop : window.pageYOffset
 crossobj.top=scroll_top-250+calunits
 crossobj.visibility=(dom||ie)? "visible" : "show"
 dropstart=setInterval("dropin()",50)
 }

function dropin(){
 scroll_top=(ie)? truebody().scrollTop : window.pageYOffset
 if (parseInt(crossobj.top)<100+scroll_top)
 crossobj.top=parseInt(crossobj.top)+40+calunits
 else{
 clearInterval(dropstart)
 bouncestart=setInterval("bouncein()",50)
 }
 }

function bouncein(){
 crossobj.top=parseInt(crossobj.top)-bouncelimit+calunits
 if (bouncelimit<0)
 bouncelimit+=8
 bouncelimit=bouncelimit*-1
 if (bouncelimit==0){
 clearInterval(bouncestart)
 }
 }

function dismissbox(){
 if (window.bouncestart) clearInterval(bouncestart)
 crossobj.visibility="hidden"
 }

function truebody(){
 return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
 }

window.onload=initbox