var banner=new Array()
banner[0]='<img src="banner_slide/01.gif" width="168" height="87" BORDER="0">'
banner[1]='<img src="banner_slide/02.gif" width="168" height="87" BORDER="0">'
banner[2]='<img src="banner_slide/03.gif" width="168" height="87" BORDER="0">'
banner[3]='<img src="banner_slide/04.gif" width="168" height="87" BORDER="0">'
banner[4]='<img src="banner_slide/05.gif" width="168" height="87" BORDER="0">'
banner[5]='<img src="banner_slide/06.gif" width="168" height="87" BORDER="0">'
var whichbanner=Math.floor(Math.random()*(banner.length))
document.write(banner[whichbanner])