var timer1,timer2;
var FastMovedPx;
var MovedPx;
var i;
var Items=0,StopPx,ReStartTime,WaitTime,MaxPx;

//Items  = 2;				/* 行数を入力 */
StopPx = 100*1;				/* 移動量 */
ReStartTime = 4000;			/* 再始動までの時間(ミリ秒) */
WaitTime    = 1;			/* 一時停止している時間(秒) */

var FastStopPx = 0;
var FastStopTime = 4000;

var Browser;

function ShowHideLayers(){
	var agt=navigator.userAgent.toLowerCase();
	Browser1 = (agt.indexOf("aol") != -1);
	Browser2 = (agt.indexOf("opera") != -1);
	Browser3 = (agt.indexOf("webtv") != -1);

	if(!Browser1 && !Browser2 && !Browser3){
		SLayer("mask");
//		SLayer("text");
	}
}

function SLayer(name){
	if(navigator.appName.charAt(0)=="M"){
		if (navigator.appVersion.indexOf("MSIE 5") != -1 || navigator.appVersion.indexOf("MSIE 6") != -1){
			if(document.getElementById){document.getElementById(name).style.visibility="visible"}
		}else{
			if(document.all){document.all(name).style.visibility="visible"}
		}
	}
	if(navigator.appName.charAt(0)=="N"){
		if(document.getElementById){document.getElementById(name).style.visibility="visible"}
		if(document.layers){document.layers[name].visibility="show"}
	}
}

function HLayer(name){
	if(navigator.appName.charAt(0)=="M"){
		if (navigator.appVersion.indexOf("MSIE 5") != -1 || navigator.appVersion.indexOf("MSIE 6") != -1){
			if(document.getElementById){document.getElementById(name).style.visibility="hidden"}
		}else{
			if(document.all){document.all(name).style.visibility="hidden"}
		}
	}
	if(navigator.appName.charAt(0)=="N"){
		if(document.getElementById){document.getElementById(name).style.visibility="hidden"}
		if(document.layers){document.layers[name].visibility="hide"}
	}
}

function Start(){
	timer1 = setTimeout("ScrollStart()", FastStopTime);
}

function ScrollStart(){
	if(timer1){clearInterval(timer1)};
	if(timer2){clearInterval(timer2)};
	timer1 = setInterval("LayerScroll('text',1)", WaitTime);
}

function ScrollStop(){
	if(timer1){clearInterval(timer1)};
	if(timer2){clearInterval(timer2)};
	timer2 = setInterval("ScrollStart()", ReStartTime);
}

function LayerScroll(name, MovePx) {
	var g;
	var elo=name;
	var f="";
	var m=false;
	var d="";
	var Movedflg = 0;

	g=Objfind(name);
	if(document.layers){
		d=g;			//NN4.6
	}else{
		d=g.style;		//IE,NN6,NN7
	}

	if(parseInt(d.top)){
		var NowTop=parseInt(d.top);
	}else{
		var NowTop=0;
	}

	if (NowTop > MaxPx){
		FastMovedPx = (NowTop * -1) + MovePx;
		MovedPx += MovePx;
		NowTop -= MovePx;
		m=true;
	}
	if(NowTop <= MaxPx){
		NowTop = 0;
		FastMovedPx = 0;
		MovedPx = 0;
		m=true;
		Movedflg = 1;
	}

	if((NowTop * -1) <= FastStopPx){
		if (FastMovedPx >= FastStopPx){
			FastMovedPx = 0;
			MovedPx = 0;
			ScrollStop();
		}
	}else{
		if (MovedPx >= StopPx){
			MovedPx = 0;
			ScrollStop();
		}
	}

	if (m) {
		if((navigator.appName=="Netscape") && parseInt(navigator.appVersion)>4){
			NowTop+="px";
		}
		d.top=NowTop;
		g.moved=true;
	}else {
		g.moved=false;
	}

	return;
}

function LayerMove(name, MovePx) {
	var g;
	var elo=name;
	var f="";
	var m=false;
	var d="";
	var Movedflg = 0;

	g=Objfind(name);
	if(document.layers){
		d=g;			//NN4.6
	}else{
		d=g.style;		//IE,NN6,NN7
	}

	if(parseInt(d.top)){
		var NowTop=parseInt(d.top);
	}else{
		var NowTop=0;
	}

	NowTop -= MovePx;
	m=true;

	if (m) {
		if((navigator.appName=="Netscape") && parseInt(navigator.appVersion)>4){
			NowTop+="px";
		}
		d.top=NowTop;
		g.moved=true;
	}else {
		g.moved=false;
	}

	return;
}

function Objfind(name) {
	var i;
	var Objfind;
	var d=document;

	if(!(Objfind=d[name]) && d.all){									//IE
		Objfind=d.all[name];
	}
	for(i=0; !Objfind && i<d.forms.length; i++){						//?
		Objfind=d.forms[i][name];
	}
	for(i=0; !Objfind && d.layers && i<d.layers.length; i++){			//NN4.6
		Objfind=d.layers[i].document[name];
	}
	if(!Objfind && d.getElementById){									//NN6,NN7
		Objfind=d.getElementById(name);
	}
	return Objfind;
}


/*****************************************/
/* 処理開始
/*****************************************/
var tmp = $('scroll_items');
if(tmp){
	var sc_len = tmp.getElementsByTagName('li').length;
	Items = Math.ceil(sc_len / 2) -0;
	if((sc_len & 1) != 0){
		var tmp2 = tmp.getElementsByTagName('li')[Math.floor(Math.random()*sc_len)].cloneNode(true);
		tmp.appendChild(tmp2);
	}
	for(i=0; i<4; i++){
		var tmp2 = tmp.getElementsByTagName('li')[i].cloneNode(true);
		tmp.appendChild(tmp2);
	}
	

	MaxPx = -(StopPx * Items);	// 移動後の最終位置
	FastMovedPx = 0;
	MovedPx = 0;


	ShowHideLayers();
	LayerMove('text',FastStopPx);
	Start();
}