返回后恢复原来的值
<HTML>
<HEAD>
<META NAME="save" CONTENT="history">
<STYLE>
.saveHistory {behavior:url(#default#savehistory);}
</STYLE>
</HEAD>
<BODY>
<INPUT class=saveHistory type=text id=oPersistInput>
</BODY>
</HTML>
<HEAD><META NAME="save" CONTENT="history"><STYLE>
.saveHistory {behavior:url(#default#savehistory);}
</STYLE></HEAD><BODY><INPUT class=saveHistory type=text id=oPersistInput></BODY></HTML>