不要用history.back,都写在同一个文件里,就能输出提交的变量<?php
//if error echo "Error message" else header("Location:another.php");
?>
<form>
<input type=text name=username value="<?php print($username); ?>">
<input type=submit value="submit">
</form>
//if error echo "Error message" else header("Location:another.php");
?>
<form>
<input type=text name=username value="<?php print($username); ?>">
<input type=submit value="submit">
</form>
<STYLE>
input {behavior:url(#default#savehistory);}
</STYLE> 就可以了.