// ランダム画像用プリロード
count = 0;
data = new Array("image/top01.jpg","image/top01_a.jpg","image/top01_b.jpg","image/top01_c.jpg","image/03.jpg","image/top03_a.jpg","image/top03_b.jpg","image/top03_c.jpg");
prImg= new Array();
for (i=0; i<data.length; i++)
{
	prImg[i] = new Image();
	prImg[i].src = data[i];
}

// ランダム値を決める
imgURL  = new Array();
imgURL[0]  = "image/top01";
imgURL[1]  = "image/top03";
n = Math.floor(Math.random()*imgURL.length);

// ランダム画像表示用
function auto()
{
document.write("<img src='"+imgURL[n]+".jpg' width='588' height='280' border='0' name='img_ch'>");
}

// ランダム画像マウスオーバー時の設定
function swImga(iName,str)
{
str = imgURL[n]+"_a.jpg";
	document.images[iName].src = str;
}
function swImgb(iName,str)
{
str = imgURL[n]+"_b.jpg";
	document.images[iName].src = str;
}
function swImgc(iName,str)
{
str = imgURL[n]+"_c.jpg";
	document.images[iName].src = str;
}

// ランダム画像マウスアウト時の設定
function swImgre(iName,str)
{
str = imgURL[n]+".jpg";
	document.images[iName].src = str;
}

// その他画像マウスオーバー時の設定
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];}
}
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) { //v4.01
  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;
}