一个简单的PHP投票系统

;<center>更新主题：</font><select name="select">
   <option selected>选项数目</option>
   <option value="2">2</option>
   <option value="3">3</option>
   <option value="4">4</option>
   <option value="5">5</option>
</select>
<input type="submit" name="Submit_tp" value="确定">


<?
echo "　　<a href=\"$PHP_SELF?vhistory=yes\"><font color=#ff9900>查看历史记录</font><a>　　";
echo "<a href=\"$PHP_SELF?stop=yes\"><font color=#ff9900>停止使用投票系统</font></a>　　";
echo "<a href=\"admin.php3\"><font color=#ff9900>文章管理</font></a>";
echo "</center></form> <hr size=\"1\" color=\"#ff9900\">";
if ($Submit_tp) {
?>
<SCRIPT language=JavaScript>
<!--
var submitcount=0;
function check_com(){
if(document.form_tp.theme.value.length ==0){
     submitcount--;
     alert("主题没有填写！\nYou must supply a subject.");
     return false;
  }
　
<?
for ($t=1;$t<=$select;$t++) {
?>
  if(document.form_tp.<? echo $xuanxiang[$t]; ?>.value.length ==0){
     submitcount--;
     alert("选项没有填写完整\nYou must supply a option.");
     return false;
  }
　　
<?
}
?>

}
//-->
</SCRIPT>
<form name="form_tp" onsubmit="return check_com()" action="<? echo $PHP_SELF; ?>" method="post" >
<table width="100%" border="0" cellspacing="0" cellpadding="0">
   <tr>
     <td width="23%" bgcolor="#f5f5f5">
       <div align="center">主 题：</div>
     </td>
     <td width="77%" bgcolor="#f5f5f5">
       <input type="text" name="theme"><input type="hidden" name="select2" value="<? echo $select; ?>">
     </td>
   </tr>
   <tr>
     <td width="23%">
       <div align="center">选 项：</div>
     </td>
     <td width="77%">
     <?
    &n