// Dreamweaverが生成したやつ
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_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_findObj(n, d) { //v4.0
	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 && document.getElementById) x=document.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];}
}

// 複数画像をランダムに切り換える by MKT
// http://www3.ocn.ne.jp/~kikux68k/javascript.html を参考
var imgnum1 = 0;
var imgnum2 = 1;
var imgnum3 = 2;
var imgnum4 = 3;
var imgnum5 = 4;
var interval = 5;
intervalMax = 12;	// 画像切換え間隔の最大値
imgMax = 12;	// 画像の枚数
img = new Array();
img[0] = new Image(); img[0].src = "top_image01.jpg";
img[1] = new Image(); img[1].src = "top_image02.jpg";
img[2] = new Image(); img[2].src = "top_image03.jpg";
img[3] = new Image(); img[3].src = "top_image04.jpg";
img[4] = new Image(); img[4].src = "top_image05.jpg";
img[5] = new Image(); img[5].src = "top_image06.jpg";
img[6] = new Image(); img[6].src = "top_image07.jpg";
img[7] = new Image(); img[7].src = "top_image08.jpg";
img[8] = new Image(); img[8].src = "top_image09.jpg";
img[9] = new Image(); img[9].src = "top_image10.jpg";
img[10] = new Image(); img[10].src = "top_image11.jpg";
img[11] = new Image(); img[11].src = "top_image12.jpg";

function change_image1(){
	document.myImg1.src=img[imgnum1].src;
	imgnum1 = Math.floor(Math.random() * imgMax);
	interval = Math.floor(Math.random() * intervalMax) + 2;
	setTimeout("change_image1()",interval * 1000);
}
function change_image2(){
	document.myImg2.src=img[imgnum2].src;
	imgnum2 = Math.floor(Math.random() * imgMax);
	interval = Math.floor(Math.random() * intervalMax) + 2;
	setTimeout("change_image2()",interval * 1000);
}
function change_image3(){
	document.myImg3.src=img[imgnum3].src;
	imgnum3 = Math.floor(Math.random() * imgMax);
	interval = Math.floor(Math.random() * intervalMax) + 2;
	setTimeout("change_image3()",interval * 1000);
}
function change_image4(){
	document.myImg4.src=img[imgnum4].src;
	imgnum4 = Math.floor(Math.random() * imgMax);
	interval = Math.floor(Math.random() * intervalMax) + 2;
	setTimeout("change_image4()",interval * 1000);
}
function change_image5(){
	document.myImg5.src=img[imgnum5].src;
	imgnum5 = Math.floor(Math.random() * imgMax);
	interval = Math.floor(Math.random() * intervalMax) + 2;
	setTimeout("change_image5()",interval * 1000);
}

// 著作権表示Alertダイアログ by MKT
// http://www.interq.or.jp/pink/taka1112/javascript/js_alert03.html のパクリ
function copyright(){ window.alert("著作権は大貝研究室に属します。\n当サイトに掲載されている文章や画像などの\n無断転載は禁止します。") }