if (document.images) {
	//sidenavi
	setImgObj('side01_off','/rsrc/image/common/leftnavi_trend_off.gif');
	setImgObj('side01_on','/rsrc/image/common/leftnavi_trend_on.gif');
	setImgObj('side02_off','/rsrc/image/common/leftnavi_world_off.gif');
	setImgObj('side02_on','/rsrc/image/common/leftnavi_world_on.gif');
	setImgObj('side03_off','/rsrc/image/common/leftnavi_ranking_off.gif');
	setImgObj('side03_on','/rsrc/image/common/leftnavi_ranking_on.gif');
	setImgObj('side04_off','/rsrc/image/common/leftnavi_weekly_off.gif');
	setImgObj('side04_on','/rsrc/image/common/leftnavi_weekly_on.gif');
}