html特效代码 29. 网页不会被缓存

<META HTTP-EQUIV="pragma" CONTENT="no-cache"> 

<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate"> 

<META HTTP-EQUIV="expires" CONTENT="Wed, 26 Feb 1997 08:21:57 GMT"> 

或者<META HTTP-EQUIV="expires" CONTENT="0">