BootStrap日期控件在模态框中选择时间下拉菜单无效的原因及解决办法(火狐下不能点击)

<div class="modal fade bs-example-modal-lg winningUser" id="editor" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel">
<div class="modal-dialog modal-lg" style="width:60%;" >
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" id="topClose"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
<h4 class="modal-title">请选择本轮次使用的奖品</h4>
</div>
<div style="min-height:400px;padding:0 20px 20px 20px;">
<form id="awardForm" method="post" action="${base }/activity/ajax_add_award_settings.json" class="form-horizontal bootstrap-validator-form" > 

<div class="modal fade bs-example-modal-lg" id="editor">
<div class="modal-dialog modal-lg" style="width:60%;" >
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" id="topClose"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
<h4 class="modal-title">请选择本轮次使用的奖品</h4>
</div>
<div style="min-height:400px;padding:0 20px 20px 20px;">
<form id="awardForm" method="post" action="${base }/activity/ajax_add_award_settings.json" class="form-horizontal" >