//マウスオーバー
function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
  if (document.images && (preloadFlag == true)) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
    }
  }
}

var preloadFlag = false;
function preloadImages() {
  if (document.images) {
    navi_01_over = newImage("/common/navi_01_over.gif");
    navi_02_over = newImage("/common/navi_02_over.gif");
    navi_03_over = newImage("/common/navi_03_over.gif");
    navi_04_over = newImage("/common/navi_04_over.gif");
    navi_05_over = newImage("/common/navi_05_over.gif");
    preloadFlag = true;
  }
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		top_navi_01_over = newImage("images/top_navi_01-over.gif");
		top_navi_02_over = newImage("images/top_navi_02-over.gif");
		top_navi_03_over = newImage("images/top_navi_03-over.gif");
		top_navi_04_over = newImage("images/top_navi_04-over.gif");
		top_navi_05_over = newImage("images/top_navi_05-over.gif");
		preloadFlag = true;
	}
}

//このページのトップへ
var Mac = navigator.appVersion.indexOf('Mac',0) != -1;
var Win = navigator.appVersion.indexOf('Win',0) != -1;
var IE  = navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1;
var NN  = navigator.appName.indexOf("Netscape",0) != -1;
var Moz = navigator.userAgent.indexOf("Gecko") != -1;
var Vmajor = parseInt(navigator.appVersion);	// ex. 3
var Vminor = parseFloat(navigator.appVersion);	// ex. 3.01
var MacIE4 = ((Mac && navigator.appVersion.indexOf('MSIE 4.',0) != -1));
var MacIE3 = ((Mac && navigator.appVersion.indexOf('MSIE 3.',0) != -1));

function getScrollLeft() {
	if ((navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1)) {
		return document.body.scrollLeft;
	} else if (window.pageXOffset) {
		return window.pageXOffset;
	}else{
		return 0;
	}
}

function getScrollTop() {
	if ((navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1)) {
		return document.body.scrollTop;
	} else if (window.pageYOffset) {
		return window.pageYOffset;
	} else {
		return 0;
	}
}

function getScrollWidth() {
	if ((navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1)) {
		return document.body.scrollWidth;
	} else if (window.innerWidth) {
		return window.innerWidth;
	}
	return 0;
}

function getScrollHeight() {
	if ((navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1)) {
		return document.body.scrollHeight;
	} else if (window.innerHeight) {
		return window.innerHeight;
	}
	return 0;
}

var pageScrollTimer;

function pageScroll(toX,toY,frms,cuX,cuY) {
 if (pageScrollTimer) clearTimeout(pageScrollTimer);
 if (!toX || toX < 0) toX = 0;
 if (!toY || toY < 0) toY = 0;
 if (!cuX) cuX = 0 + getScrollLeft();
 if (!cuY) cuY = 0 + getScrollTop();
 if (!frms) frms = 6;

 cuX += (toX - getScrollLeft()) / frms; if (cuX < 0) cuX = 0;
 cuY += (toY - getScrollTop()) / frms;  if (cuY < 0) cuY = 0;
 var posX = Math.floor(cuX);
 var posY = Math.floor(cuY);
 window.scrollTo(posX, posY);
 if (posX != toX || posY != toY) {
  pageScrollTimer = setTimeout("pageScroll("+toX+","+toY+","+frms+","+cuX+","+cuY+")",16);
 }
}

function toTop(){
	if (!MacIE3 && !MacIE4 && !NN && window.scrollTo || NN && (Vminor >= 4.75) && window.scrollTo) {
		pageScroll(0,0,6);
	} else {
		location.hash = "top";
	}
}