trustieforge/app/views/forums/_form.html.erb

<ul class="newuploadbox">
  <li class="mb10 clear">
    <label class="fl" style="width: 90px;text-align: right;">贴吧名称&nbsp;&nbsp;:&nbsp;</label>
    <!--<input maxlength="80"  class="postCreateInput" onfocus="hideError();" onblur="check_forum_name();" placeholder="输入贴吧名称"  >-->
    <%= f.text_field :name, :label => "", :name => "forum[name]",  :id => "forum_name", :onblur => "check_forum_name()", :class => "issues_calendar_input fl", :style => "width:320px;height:28px;", :placeholder => "请输入贴吧名称，最多50个字符", :onfocus => "$('#forum_name_error_tips').hide();" %>
    <!--<input type="text" name="forum[name]"  id="forum_name" onfocus="$('#forum_name_error_tips').hide();" placeholder="请输入贴吧名称，最多50个字符"  class="issues_calendar_input fl" style="width:320px;height:28px;">-->
    <div class="clear"></div>
    <p class="c_red ml90" style="display: none" id="forum_name_error_tips"></p>
  </li>
  <li class=" clear">
    <label class="fl" style="width: 90px;text-align: right;">贴吧描述&nbsp;&nbsp;:&nbsp;</label>
    <%= f.text_area :description, :label => "", :maxlength => "5000", :name => "forum[description]",  :id => "forum_desc", :class => "mr15 mb10 fl newupload_textarea", :style => "width:320px;height:100px;", :placeholder => "请输入新建贴吧描述，最多5000个字符", :onfocus => "$('#forum_description_error_tips').hide();" %>
    <div class="clear"></div>
    <p class="c_red ml90" style="display: none" id="forum_description_error_tips"></p>
  </li>

</ul>
<div class="clear mr45 mb10">
  <a href="javascript:void(0);" class="btn fr" onclick="hideModal()" >取消</a>
  <a href="javascript:void(0);" class="btn btn-blue fr mr5" onclick="forums_commit();">确定</a>
</div>


<script>
    function check_forum_name(){
        if ($("#forum_name").val().trim() == ""){
            $("#forum_name_error_tips").html("贴吧名称不能为空").show();
        }else if($("#forum_name").val().length > 50){
            $("#forum_name_error_tips").html("贴吧名称不能超过50个字符").show();
        }
    }
    function forums_commit(){
        $("#forum_name_error_tips").hide();
        $("#forum_description_error_tips").hide();
        if ($("#forum_name").val().trim() == ""){
            $("#forum_name_error_tips").html("贴吧名称不能为空").show();
        }
        else if($("#forum_name").val().length > 50){
            $("#forum_name_error_tips").html("贴吧名称不能超过50个字符").show();
        }
        else if($("#forum_desc").val().trim() == ""){
            $("#forum_description_error_tips").html("贴吧描述不能为空").show();
        }
        else if($("#forum_desc").val().length > 5000){
            $("#forum_description_error_tips").html("贴吧描述不能超过5000个字符").show();
        }
        else{
            $.ajax({
                url:'<%= check_forum_name_forums_path(:forum_id => @forum.try(:id)) %>',
                type:'get',
                data:{
                    forum_name:$("#forum_name").val().trim()
                },
                success:function(data){
                    if(data.result == true){
                        $("#forum_new").submit();
                        hideModal();
                        return true;
                    }else{
                        $("#forum_name_error_tips").html("贴吧名称已存在").show();
                        return false;
                    }
                },
                error:function(){
                    alert('请检查当前网络连接')
                }
            });
        }
    }
</script>