if(navigator.appVersion.charAt(0) >=3){
	var rollimg = new Array();
	
	for( i = 0 ; i < 22 ; i++ ){
		rollimg[i] = new Image();
	}

	rollimg[0].src= "/common/images/navi_top_off.gif";
	rollimg[1].src= "/common/images/navi_top_on.gif";
	rollimg[2].src= "/common/images/navi_class_off.gif";
	rollimg[3].src= "/common/images/navi_class_on.gif";
	rollimg[4].src= "/common/images/lesson.gif";
	rollimg[5].src= "/common/images/lesson_on.gif";
	rollimg[6].src= "/common/images/navi_curriculum_off.gif";
	rollimg[7].src= "/common/images/navi_curriculum_on.gif";
	rollimg[8].src= "/common/images/navi_info_off.gif";
	rollimg[9].src= "/common/images/navi_info_on.gif";
	rollimg[10].src= "/common/images/navi_school_off.gif";
	rollimg[11].src= "/common/images/navi_school_on.gif";
	rollimg[12].src= "/common/images/navi_faq_off.gif";
	rollimg[13].src= "/common/images/navi_faq_on.gif";
	rollimg[14].src= "/common/images/navi_gallery_off.gif";
	rollimg[15].src= "/common/images/navi_gallery_on.gif";
	rollimg[16].src= "/common/images/navi_column_off.gif";
	rollimg[17].src= "/common/images/navi_column_on.gif";
	rollimg[18].src= "/common/images/btn_map_off.gif";
	rollimg[19].src= "/common/images/btn_map_on.gif";
	rollimg[20].src= "/common/images/btn_toiawase_off.gif";
	rollimg[21].src= "/common/images/btn_toiawase_on.gif";
}

function rollover(dim,cnt){
	if(navigator.appVersion.charAt(0) >= 3 ){
		document.images[dim].src=rollimg[cnt].src;
	}
}