我正在尝试将Freshdesk表单上的两个下拉菜单自动设置为特定值。我有一个下拉表示行为，但使用相同的代码不影响第二个下拉列表（值已更改，而不是字面上相同的代码。
工作下拉
<select class=" dropdown_blank" id="helpdesk_ticket_product_id" name="helpdesk_ticket[product_id]"><option value="">...</option>
<option value="36000002397">Stack Overflow Community</option>
<option value="36000001553">Stack Overflow for Teams</option>
<option value="36000002396">Stack Overflow Talent</option></select>
</div>
document.getElementById('helpdesk_ticket_product_id').value=36000002396;
非工作下拉
<select class=" required nested_field" id="helpdesk_ticket_custom_field_cf_department_856620" name="helpdesk_ticket[custom_field][cf_department_856620]"><option value="">...</option>
<option value="Talent">Talent</option>
<option value="Teams">Teams</option>
<option value="N/A">N/A</option></select><div class="level_2"><label class="required">Category</label><select class=" required nested_field" id="helpdesk_ticket_custom_field_cf_category_856620" name="helpdesk_ticket[custom_field][cf_category_856620]"><option value="">...</option>
</select></div>
document.getElementById('helpdesk_ticket_custom_field_cf_department_856620').value=Talent;
我需要做些额外的事情，因为第二个下拉列表是嵌套的吗？我只想指定第一个下拉列表，但要求用户自己选择第二个嵌套字段。
如果它有帮助，我已经添加了整个脚本部分：
<script type='text/javascript'>
var getParameterByName = talent
var talent = ['helpdesk_ticket_custom_field_cf_teams_url_856620']
if(getParameterByName= 'talent'){
talent.map(function(field_id){
jQuery('#'+field_id).parents('.control-group').remove();
})
}
document.getElementById('helpdesk_ticket_product_id').value=36000002396;
document.getElementById('helpdesk_ticket_custom_field_cf_department_856620').value=Talent;
</script>
document.getElementById上面的函数是一个隐藏某些字段的脚本。
HTML来源：
<div class="page">
<!-- Search and page links for the page -->
<!-- Notification Messages -->
<div class="alert alert-with-close notice" id="noticeajax" style="display:none;"></div>
<div class="c-wrapper">
<div class="new_ticket_page">
<section class="content main rounded-6 fc-new-ticket">
<h3 class="heading">Submit a ticket</h3>
<form accept-charset="UTF-8" action="/support/tickets" class="form-portal ticket-form" enctype="multipart/form-data" id="new_helpdesk_ticket" method="post" rel="validate"><div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="✓" /><input name="authenticity_token" type="hidden" value="3xOZ+O420PsIskGZYjEEpcyo8pJDgvtEaAVR5YCqsF0=" /></div>
<div class="control-group " >
<label class=" required control-label requester-label " for="helpdesk_ticket_email">Requester</label>
<div class="controls ">
<div class="row-fluid">
<input class="span12 email required" data-check-email-path="/support/tickets/check_email" data-remote-triggers="focusout" data-remote="true" id="helpdesk_ticket_email" name="helpdesk_ticket[email]" placeholder="Email" size="30" type="email" value="" />
<div id="name_field" class="default_name_field hide">
<input class="text span12 name_field" placeholder="Your Name"
name="helpdesk_ticket[name]" type="text" disabled="disabled" />
</div>
</div>
</div>
</div>
<div class="control-group " >
<label class=" required control-label subject-label " for="helpdesk_ticket_subject">Subject</label>
<div class="controls ">
<input class=" required text span12" id="helpdesk_ticket_subject" name="helpdesk_ticket[subject]" size="30" type="text" />
</div>
</div>
<div class="control-group " >
<label class=" control-label product-label " for="helpdesk_ticket_product">Product</label>
<div class="controls ">
<select class=" dropdown_blank" id="helpdesk_ticket_product_id" name="helpdesk_ticket[product_id]"><option value="">...</option>
<option value="36000002397">Stack Overflow Community</option>
<option value="36000001553">Stack Overflow for Teams</option>
<option value="36000002396">Stack Overflow Talent</option></select>
</div>
</div>
<div class="control-group " >
<label class=" required control-label cf_department_856620-label " for="helpdesk_ticket_cf_department_856620">Product Categories</label>
<div class="controls nested_field ">
<select class=" required nested_field" id="helpdesk_ticket_custom_field_cf_department_856620" name="helpdesk_ticket[custom_field][cf_department_856620]"><option value="">...</option>
<option value="Talent">Talent</option>
<option value="Teams">Teams</option>
<option value="N/A">N/A</option></select><div class="level_2"><label class="required">Category</label><select class=" required nested_field" id="helpdesk_ticket_custom_field_cf_category_856620" name="helpdesk_ticket[custom_field][cf_category_856620]"><option value="">...</option>
</select></div><script type="text/javascript">
//<![CDATA[
jQuery('#helpdesk_ticket_custom_field_cf_department_856620').nested_select_tag({"data_tree":[["Talent","Talent",[["API & Integrations","API & Integrations",[]],["Banner Ads","Banner Ads",[]],["Candidate Search","Candidate Search",[]],["Company Page Ads","Company Page Ads",[]],["Company Pages","Company Pages",[]],["Control Panel","Control Panel",[]],["Dashboard","Dashboard",[]],["Job Listing","Job Listing",[]],["N/A","N/A",[]],["Recommended Candidates","Recommended Candidates",[]],["User & Team Accounts","User & Team Accounts",[]]]],["Teams","Teams",[["Administration","Administration",[]],["Billing","Billing",[]],["Technical","Technical",[]],["Usage","Usage",[]]]],["N/A","N/A",[["N/A","N/A",[]]]]],"initValues":null,"disable_children":false,"include_blank":"...","selected":null,"pl_value_id":null,"subcategory_id":"helpdesk_ticket_custom_field_cf_category_856620"});
//]]>
</script>
</div>
</div>
<div class="control-group " >
<label class=" required control-label cf_customer_account_856620-label " for="helpdesk_ticket_cf_customer_account_856620">Control Panel, Salesforce, or Talent link.</label>
<div class="controls ">
<input class=" required text span12" id="helpdesk_ticket_custom_field_cf_customer_account_856620" name="helpdesk_ticket[custom_field][cf_customer_account_856620]" size="30" type="text" />
</div>
</div>
<div class="control-group " >
<label class=" required control-label cf_teams_url_856620-label " for="helpdesk_ticket_cf_teams_url_856620">Teams URL</label>
<div class="controls ">
<input class=" required text span12" id="helpdesk_ticket_custom_field_cf_teams_url_856620" name="helpdesk_ticket[custom_field][cf_teams_url_856620]" size="30" type="text" />
</div>
</div>
<div class="control-group " >
<label class=" required control-label description-label " for="helpdesk_ticket_description">Description</label>
<div class="controls ">
<textarea class=" required_redactor html_paragraph span12" cols="40" id="helpdesk_ticket_ticket_body_attributes_description_html" name="helpdesk_ticket[ticket_body_attributes][description_html]" rows="6">
</textarea> <div class="single_file">
<div class="attach-wrapper row-fluid new-attach" id="attachment-type" data-multifile-enable="true" data-location="portal">
<div class="attachments-list-wrap">
<div class="attachments-list-form" id="ticket-container">
<div class="attachment_contents">
<div id="ticket-attachments" class="attachments-wrap shared_attachment_list">
</div>
</div>
</div>
答案 0 :(得分：0)
由于您的价值（＆＃34; Talent＆＃34;）是一个字符串，您必须使用
document.getElementById('helpdesk_ticket_custom_field_cf_department_856620').value='Talent';
另一种方法：
document.getElementById('helpdesk_ticket_custom_field_cf_department_856620').querySelector('option[value="Talent"]').selected = true;
修改
您的代码中还有一些问题。它应该是：
<script type='text/javascript'>
var getParameterByName = 'talent';
var talent = ['helpdesk_ticket_custom_field_cf_teams_url_856620'];
if(getParameterByName === 'talent'){
talent.map(function(field_id){
jQuery('#'+field_id).parents('.control-group').remove();
});
}
document.getElementById('helpdesk_ticket_product_id').value='36000002396';
document.getElementById('helpdesk_ticket_custom_field_cf_department_856620').value='Talent';
</script>
在第3行中，您错过了（单个）引号。
在第7行中，正确的运算符是＆＃34; ==＆＃34;或＆＃34; ===＆＃34; （见https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Comparison_Operators）
在第15行中你也错过了单引号（实际上它们也应该在第13行中使用，因为 value s总是字符串。）