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

var bouncelimit=0 //(must be divisible by 8)
var topoffset=20 //上のオフセット
var dropinspeed=100 //スピード
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()",dropinspeed)
}

function dropin(){
scroll_top=(ie)? truebody().scrollTop : window.pageYOffset
if (parseInt(crossobj.top)<topoffset+scroll_top)
crossobj.top=parseInt(crossobj.top)+topoffset+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
}

function getcookie(CookieName){ 
	CookieName += '=';
	cookiestr = document.cookie + ';';
	checkstart = cookiestr.indexOf(CookieName)
	if (document.cookie.length>0) {
    	if (checkstart != -1){
			checkend = cookiestr.indexOf(";",checkstart);
			return unescape(cookiestr.substring(checkstart + CookieName.length , checkend));
		}
	}
	return false;  
}
function insertCookie( cnstr )
{
	document.cookie = cnstr + '=close;expires=Thu, 1-Jan-2030 00:00:00 GMT';

}