onepage_mrhi/tm/template_dir/events_forms_template_new.html

<form id="ff">
    <{foreach from=$forms item=form}>
    <{if $form.type == 'text'}>
    <input name="<{$form.name}>" type="text" class="input_style" placeholder="<{$form.name}>" > 
    <{/if}>
    <{if $form.type == 'textarea'}>
    <textarea name="<{$form.name}>" class="input_textarea" placeholder="<{$form.name}>"></textarea>
    <{/if}>
    <{if $form.type == 'select'}>
    <select name="<{$form.name}>" class="dropdown-select">
                 <option value="">请选择<{$form.name}></option>
                 <{foreach from=$form.options item=option}>
                 <option value="<{$option}>"><{$option}></option>
                 <{/foreach}>
               </select>
    <{/if}>
    <{/foreach}>
</form>
<section class="button-wrapper">
    <a class="button"  id="common_submit_btn">提交资料</a>
</section>

<script>
$("select").on('change', function () {
    if ($(this).val() == '') {
        $(this).css({'color':'#999'});
    } else {
        $(this).css({'color':''});
    }
});
</script>