/* トップランダム画像 */
window.onload = function(){
//var url = "a.jpg,b.jpg,c.jpg".split(',');
var url=[];
url[0] = 'main_img.jpg';
url[1] = 'main_img2.jpg';
url[2] = 'main_img3.jpg';
url[3] = 'main_img4.jpg';
var n = Math.floor(Math.random() * url.length);
var elm = document.getElementById('main');
elm.style.backgroundImage = 'url(common/img/' + url[n] + ')';
}


/* safari用のフォントサイズ指定 */
if(navigator.userAgent.match(/Safari/)){
	document.write('<style type="text/css">#flame {font-size:70%;}</style>');
}

/*=====mouseOver_start=====*/

function btn_change(imgName,n){
	document.images[imgName].src= IMG[n];
}


/*=====DWスワップイメージ=====*/
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}



//=========================================================
/* ブラウザチェック */
var _Ver = navigator.appVersion.charAt(0);
var _Ie = ( navigator.userAgent.indexOf("MSIE") != -1 );
var _Mac = ( navigator.appVersion.indexOf("Mac") != -1 );


/* スクロール */

function vScrollToTop() {
	vScrollTo(0);
}

function vScrollToObj( id ) {
	var y = _v_GetObjPosY(id);
	vScrollTo( y );
}

function vScrollTo( y ) {
	if( _v_scrollTimer ) clearInterval( _v_scrollTimer );
	_v_scrollToY = y;
	_v_scrollLastY = _v_GetScrollPosY();
	_v_scrollTimer = setInterval( '_v_ScrollDo();', 15 );
}


//=========================================================
//Document Scroll
var _v_scrollToY;
var _v_scrollLastY;
var _v_scrollTimer;

function _v_ScrollDo() {
	var d = _v_scrollLastY - _v_scrollToY;
	var done = false;
	if( Math.abs(d)<1 ) {
		done = true;
		_v_scrollLastY = _v_scrollToY;
	} else if( _v_GetScrollPosY() != Math.floor(_v_scrollLastY) ) done = true;
	else _v_scrollLastY -= d / 12;
	self.scrollTo( 0, Math.floor(_v_scrollLastY) );
	if( done ) {
		clearInterval( _v_scrollTimer );
		_v_scrollTimer = null;
	}
}

function _v_GetScrollPosY() {
	if( _Ie ) return document.body.scrollTop;
	return self.pageYOffset;
}

function _v_GetObjPosY( id ) {
	var o = vGetObj(id);
	if( document.getElementById ) return o.offsetTop;
	if( _Ie ) return o.style.pixelTop;
	return o.top;
}


//=========================================================
function Ramdom_top() {
	ranimg = new Array();
	ranimg[0]="common/img/main_img.jpg";
	ranimg[1]="common/img/main_img2.jpg";
	ranimg[2]="common/img/main_img3.jpg";
	ranimg[3]="common/img/main_img4.jpg";
	ranimg[4]="common/img/main_img4.jpg";
	// ranimg[4]=common/img/main_img2.jpg";

	//ランダムな数字を生成  //ranimgの個数文生成される
	xx = Math.floor(ranimg.length*Math.random());

	//画像のパスを作成。
	ranimg = ranimg[Math.floor(xx)];

	//もし4の場合だけリンクを付ける。
	if (xx == '4') {
		//画像表示
		document.write('<a href="enterprise/index.html"><img src="'+ ranimg +'" width="650" height="240" alt="PECイメージ"></a><br>');
	} else {
		document.write('<img src="'+ ranimg +'" alt="PECイメージ"><br>');
	}
}