织梦dedecms自定义表单选项必填怎么修改

//增加必填字段判断 
if($required!=''){ 
if(preg_match('/,/', $required)) 
{ 
$requireds = explode(',',$required); 
foreach($requireds as $field){ 
if($$field==''){ 
showMsg('带*号的为必填内容，请正确填写', '-1'); 
exit(); //phpfensi.com 
} 
} 
}else{ 
if($required==''){ 
showMsg('带*号的为必填内容，请正确填写', '-1'); 
exit(); 
} 
} 
} 
//end

<form action="/plus/diy.php" enctype="multipart/form-data" method="post" style="padding: 0px; margin: 0px; " >`````

<input type="hidden" name="required" value="content,name,tel" />````

<script src="js/jquery-1.8.0.js"></p> <p><script src='{dede:global.cfg_templets_skin/}/style/js/js.js' type="text/javascript">

<!-- 
$(document).ready(function() 
{ 
//验证 
$('#complain').submit(function () 
{ 
if($('#yname').val()==""){ 
$('#yname').focus(); 
alert("姓名不能为空！"); 
return false; 
} 
if($('#qq').val()=="") 
{ 
$('#qq').focus(); 
alert("手机号码不能为空！"); 
return false; 
} 
if($('#tel').val()=="") 
{ 
$('#tel').focus(); 
alert("所选产品不能为空！"); 
return false; 
} 
if($('#dizhi').val()=="") 
{ 
$('#dizhi').focus(); 
alert("地址不能为空！"); 
return false; 
} 
}) 
}); 
--> 
<input type='text' name='ytel' id='ytel' style='width:250px' class='intxt' value='' />*