function Random_ImageView()
{
	path = "top_photo" + "/" ;
	myWidth = 698 ;
	myHeight = 239 ;
	// 車種を配列からランダムに選ぶ
	carname_array = new Array("911","911a","911b");
	car_name = carname_array[ Math.round( Math.random()*(carname_array.length - 1) ) ];

/*	

	 画像セットを月ごとに変更
	 now = new Date();
	 nowMonth = now.getMonth()+1 ;
	 img_number = 5 ; // 01～05までの画像セット
	 
	nowMonth = 5 ;
	img_count = (nowMonth % img_number + 1 );	
	
	if ( img_count < 10 ) {
		car_number = "0" + img_count.toString();
	}
	else {
		car_number = img_count.toString();
	}		
*/

	car_number = Math.round( Math.random()*4 ) + 1 ;
	car_number = "0" + car_number.toString();

	       document.write("<img src='" + path + car_name + "_" + car_number + ".jpg'" + " width="+ myWidth + " height=" + myHeight + "><br>") ;
}