// JavaScript Document
var scroller={
	init: function(){
		scroller.docH=document.getElementById("text").offsetHeight
		scroller.contH=document.getElementById("box").offsetHeight
		scroller.scrollAreaH=document.getElementById("scrollArea").offsetHeight
		scroller.scrollH=document.getElementById("scroller_img").offsetHeight
		scroller.scrollDist=Math.round(scroller.scrollAreaH-scroller.scrollH)
		if(scroller.docH>scroller.contH)
			Drag.init(document.getElementById("scroller"),null,0,0,0,scroller.scrollDist)
		else{
			document.getElementById("img-scroll-up").className="disabled-scroller"
			document.getElementById("img-scroll-down").className="disabled-scroller"
			document.getElementById("scrollArea").className="disabled-scroller"}
			document.getElementById("scroller").onDrag=function(x,y){
			var scrollY=parseInt(document.getElementById("scroller").style.top)
			var docY=0-(scrollY*(scroller.docH-scroller.contH)/scroller.scrollDist)
			document.getElementById("text").style.top=docY+"px"
		}
	}
}
onload=scroller.init
var goSlideTimer
var SliderStep=15
function scrollerUp() {
	stop=0
	scrollY=parseInt(document.getElementById("scroller").style.top)
	if(scroller.docH<=scroller.contH)
		return
	if(scrollY>=SliderStep)
		scrollY=scrollY-SliderStep
	else {
		stop=1
		scrollY=0
		clearTimeout(goSlideTimer)
	}
		document.getElementById("scroller").style.top=scrollY+"px"
		document.getElementById("text").style.top=scrollY+"px"
		docY=0-(scrollY*(scroller.docH-scroller.contH)/scroller.scrollDist)
		document.getElementById("text").style.top=docY+"px"
	if(!stop)
		goSlideTimer=setTimeout("scrollerUp()",100)
}
function scrollerDown() {
	stop=0
	scrollY=parseInt(document.getElementById("scroller").style.top)
	if(scroller.docH<=scroller.contH)return
	if(scrollY+SliderStep>=scroller.scrollDist){
	stop=1
	scrollY=scroller.scrollDist
	clearTimeout(goSlideTimer)}
	else
	scrollY=scrollY+SliderStep
	document.getElementById("scroller").style.top=scrollY+"px"
	document.getElementById("text").style.top=scrollY+"px"
	docY=0-(scrollY*(scroller.docH-scroller.contH)/scroller.scrollDist)
	document.getElementById("text").style.top=docY+"px"
	if(!stop)goSlideTimer=setTimeout("scrollerDown()",100)
}
function stopSlide() {
	if(goSlideTimer)
		clearTimeout(goSlideTimer)
}