// JavaScript fce pro pohyblivý div 

var dropboxleft= ((window.screen.availWidth/2 - 400)+40)//set left position of box (in px)
var dropboxtop=135 
var dropspeed=50 

// always"- "oncepersession"
var displaymode="oncepersession"

if (parseInt(displaymode)!=NaN)
var random_num=Math.floor(Math.random()*displaymode)
var ie=document.all
var dom=document.getElementById

function initboxv2( ){
	if (!dom&&!ie)
	return
	crossboxcover=(dom)?document.getElementById("dropinboxv2cover") : document.all.dropinboxv2cover
	crossbox=(dom)?document.getElementById("dropinboxv2"): document.all.dropinboxv2
	scroll_top=(ie)? truebody().scrollTop : window.pageYOffset
	crossbox.height=crossbox.offsetHeight
	crossboxcover.style.height=parseInt(crossbox.height)+"px"
	crossbox.style.top=crossbox.height*(-1)+"px"
	crossboxcover.style.left=dropboxleft+"px"
	crossboxcover.style.top=dropboxtop+"px"
	crossboxcover.style.visibility=(dom||ie)? "visible" : "show"
	dropstart=setInterval("dropinv2()",50)
}

function dropinv2(){
	scroll_top=(ie)? truebody().scrollTop : window.pageYOffset
	if (parseInt(crossbox.style.top)<0) {
		crossboxcover.style.top=scroll_top+dropboxtop+"px"
		crossbox.style.top=parseInt(crossbox.style.top)+dropspeed+"px"
	}
	else {
		clearInterval(dropstart)
		crossbox.style.top=0
	}
}

function dismissboxv2(){
	if (window.dropstart) 
		clearInterval(dropstart)
	crossboxcover.style.visibility="hidden"
}

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

function get_cookie(Name) {
	var search = Name + "="
	var returnvalue = ""
	if (document.cookie.length > 0) {
		offset = document.cookie.indexOf(search)
		if (offset != -1) {
			offset += search.length
			end = document.cookie.indexOf(";", offset)
			if (end == -1)
				end = document.cookie.length;
			returnvalue=unescape(document.cookie.substring(offset, end))
		}
	}
	return returnvalue;
	}

	if (displaymode=="oncepersession" && get_cookie("droppedinv2")=="" || displaymode=="always" || parseInt(displaymode)!=NaN && random_num==0){
		if (window.addEventListener)
			window.addEventListener("load", initboxv2, false)
		else if (window.attachEvent)
			window.attachEvent("onload", initboxv2)
		else if (document.getElementById || document.all)
			window.onload=initboxv2
		if (displaymode=="oncepersession")
			document.cookie="droppedinv2=yes"
	}