function cssfile(path){
	var u=navigator.userAgent.toLowerCase()
	if(document.layers)return
	var l='other'
	if(u.indexOf('msie')!=-1&&u.indexOf('win')!=-1)l='style_win'
	else if(u.indexOf('msie')!=-1&&u.indexOf('mac')!=-1)l='style_mac'
	else if(u.indexOf("safari")!=-1)l='safari'
	else if(u.indexOf('gecko')!=-1)l='ns'
	document.write('<link rel="stylesheet" type="text/css" href="'+path+'common.css"/><link rel="stylesheet" type="text/css" href="'+path+l+'.css"/>')
}