<form name="aaa" method="post" action="bbb.asp">
<input type=button name=b1 onclick="b1()" value=返回><script language="JavaScript">
<!--
function b1() {
aaa.action="aaa.asp"
aaa.submit()
}
//-->
</script>
<input type=button name=b1 onclick="b1()" value=返回><script language="JavaScript">
<!--
function b1() {
aaa.action="aaa.asp"
aaa.submit()
}
//-->
</script>
<input type=button name=b1 onclick="b1()" value=返回>
</form><script language="JavaScript">
<!--
function b1() {
aaa.action="aaa.asp"
aaa.submit()
}
//-->
</script>
<input TYPE="button" VALUE="返回" ONCLICK="ReloadButton()">
</form>
<script language="JavaScript"><!--
function ReloadButton(){location.href="allbutton.htm";}
// --></script>
<input type=button name=b1 onclick="location='/xx/xx.htm';location.reload()" value=返回>
or
<input type=button name=b1 onclick="location.replace('/xx/xx.htm')" value=返回>