//メニューページJAVASCRIPT

function lib_bwcheck(){
  this.ver=navigator.appVersion;
  this.agent=navigator.userAgent;
  this.dom=document.getElementById?1:0;
  this.opera5=this.agent.indexOf("Opera 5")>-1;
  this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0; 
  this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
  this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
  this.ie=this.ie4||this.ie5||this.ie6;
  this.mac=this.agent.indexOf("Mac")>-1;
  this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
  this.ns4=(document.layers && !this.dom)?1:0;
  this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5);
  return this;
}

var bw=new lib_bwcheck();

FoldNumber = 6;
var stayFolded = false;
foldImg = 1;
mainOffsetY = 0;

var px = bw.ns4||window.opera?"":"px";

if(navigator.userAgent.indexOf('Opera')>-1 && document.getElementById){ //Opera 5 resize fix
  scrX= innerWidth; scrY= innerHeight;
  document.onmousemove=function(){
    if(scrX<innerWidth-10 || scrY<innerHeight-10 || scrX>innerWidth+10 || scrY>innerHeight+10){
      scrX = innerWidth;
      scrY = innerHeight;
      initFoldout();
    }
  }
}

//object constructor...
function makeMenu(obj,nest){
  nest= (!nest)?"":'document.'+nest+'.';
  this.el= bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):document.getElementById(obj);       
  this.css= bw.ns4?this.el:this.el.style;
  this.ref= bw.ns4?this.el.document:document;             
  this.x= (bw.ns4||bw.opera5)?this.css.left:this.el.offsetLeft;
  this.y= (bw.ns4||bw.opera5)?this.css.top:this.el.offsetTop;
  this.h= (bw.ie||bw.ns6)?this.el.offsetHeight:bw.ns4?this.ref.height:bw.opera5?this.css.pixelHeight:0;
  this.vis= b_vis;
  this.hideIt= b_hideIt;
  this.showIt= b_showIt;
  this.moveIt= b_moveIt;
  return this;
}

//object methods...
function b_showIt(){this.css.visibility='visible';}
function b_hideIt(){this.css.visibility='hidden';}
function b_vis(){if(this.css.visibility=='hidden' || this.css.visibility=='HIDDEN' || this.css.visibility=='hide') return true;}
function b_moveIt(x,y){this.x=x; this.y=y; this.css.left=this.x+px; this.css.top=this.y+px;}

//画像読み込み
var unImg0=new Image();
unImg0.src="image/menu_btn1_1.gif";
var unImg1=new Image();
unImg1.src="image/menu_btn2_1.gif";
var unImg2=new Image();
unImg2.src="image/menu_btn3_1.gif";
var unImg3=new Image();
unImg3.src="image/menu_btn4_1.gif";
var unImg4=new Image();
unImg4.src="image/menu_btn5_1.gif";
var unImg5=new Image();
unImg5.src="image/menu_btn6_1.gif";
var exImg0=new Image();
exImg0.src="image/menu_btn1_2.gif";
var exImg1=new Image();
exImg1.src="image/menu_btn2_2.gif";
var exImg2=new Image();
exImg2.src="image/menu_btn3_2.gif";
var exImg3=new Image();
exImg3.src="image/menu_btn4_2.gif";
var exImg4=new Image();
exImg4.src="image/menu_btn5_2.gif";
var exImg5=new Image();
exImg5.src="image/menu_btn6_2.gif";

unImg = new Array();
unImg[0]=unImg0.src;
unImg[1]=unImg1.src;
unImg[2]=unImg2.src;
unImg[3]=unImg3.src;
unImg[4]=unImg4.src;
unImg[5]=unImg5.src;
exImg = new Array();
exImg[0]=exImg0.src;
exImg[1]=exImg1.src;
exImg[2]=exImg2.src;
exImg[3]=exImg3.src;
exImg[4]=exImg4.src;
exImg[5]=exImg5.src;

function menu(num){

  if(bw.bw){
    if (!stayFolded){
      for (var i=0; i<oSub.length; i++){
        if (i!=num){
          oSub[i].hideIt();
          if (foldImg) oTop[i].ref["imgA"+i].src = unImg[i];
        }
      }
      for(var i=1; i<oTop.length; i++){
        oTop[i].moveIt(0,oTop[i-1].y+oTop[i-1].h);
      }
    }
    if (oSub[num].vis()){
      oSub[num].showIt();
      if (foldImg)oTop[num].ref["imgA"+num].src = exImg[num];
    }else{
      oSub[num].hideIt();
      if(foldImg)oTop[num].ref["imgA"+num].src = unImg[num];
    }
    for(var i=1; i<oTop.length; i++){ 
      if (!oSub[i-1].vis()) oTop[i].moveIt(0,oTop[i-1].y+oTop[i-1].h+oSub[i-1].h+mainOffsetY);
      else oTop[i].moveIt(0,oTop[i-1].y+oTop[i-1].h+mainOffsetY);
    }
  }
}

/*********************************************************************
The init function... there should be no need to change anything here.
*********************************************************************/
function initFoldout(){
        //Fixing the browsercheck for opera... this can be removed if the browsercheck has been updated!!
        bw.opera5 = (navigator.userAgent.indexOf("Opera")>-1 && document.getElementById)?true:false;
        if (bw.opera5) bw.ns6 = 0;

        oTop = new Array();
        oSub = new Array();
        //Making the objects and hiding the subs...
        for (var i=0; i<FoldNumber; i++){
                oTop[i] = new makeMenu('divTop'+i,'divCont');
                oSub[i] = new makeMenu('divSub'+i,'divCont.document.divTop'+i);
                oSub[i].hideIt();
        }
        
        //Positioning the top objects...
        oTop[0].moveIt(0,0);
        for (var i=1; i<oTop.length; i++){
                oTop[i].moveIt(0, oTop[i-1].y+oTop[i-1].h+mainOffsetY);
        }
        
        //Making the containing menu object and showing it...
        oCont = new makeMenu('divCont');
        oCont.showIt();
}

// If the browser is ok, the script is started onload...
if(bw.bw) onload = initFoldout;