< a href=" < %=request.serverVariables("Http_REFERER")% >" >preivous page < /a >
或用图片如： < img src="arrowback.gif" alt=" < %=request.serverVariables("HTTP_REFERER")% >" >
或用图片如： < img src="arrowback.gif" alt=" < %=request.serverVariables("HTTP_REFERER")% >" >