//画像の初期化
	imgnum=1;
function changeImage(){
//画像1=spotimg1から切り替わる
	if(imgnum==1){
        document.cimg.src="top_img/spotimg1.jpg";
        imgnum=2;
    }else if(imgnum==2){
        document.cimg.src="top_img/spotimg2.jpg";
        imgnum=1;
    }
    setTimeout("changeImage()",3000);
}

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];}}
}