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

<%= content_for(:header_tags) do %>
    <%= import_ke(enable_at: false, prettify: false, init_activity: true) %>
    <%= javascript_include_tag 'new_user' %>
<% end %>

<script>


    function check_and_submit(doc){
        $("#error").html('').hide();
        check_forum_name();
        if(check_pass == false){
            return;
        }
        if(  $("textarea[name='forum[name]']").val().trim() == "" &&  $("textarea[name='forum[description]']").val().trim()  != "" ){
            $("#error").html("名称不能为空").show();
            return;
        } else if( $("textarea[name='forum[description]']").val().trim()  == "" && $("textarea[name='forum[name]']").val().trim() != "" ){
            $("#error").html("描述不能为空").show();
            return;
        }else if($("textarea[name='forum[description]']").val().trim()  == "" && $("textarea[name='forum[name]']").val().trim() == ""){
            $("#error").html("名称和描述不能为空").show();
            return;
        }
        else{
            doc.parent().parent().parent().submit();
        }
    }
    var check_pass = true;
    function check_forum_name(){
        check_pass = true;
        name = $("textarea[name='forum[name]']").val().trim();
        if( name != ""){
            $.get(
                    '<%= check_forum_name_forums_path %>',
                    {"forum_name":name,"forum_id":<%= @forum.id%>},
                    function(data){

                        if( data == 'true'){
                            $("#error").html("贴吧名称已经存在").show();
                            check_pass = false;
                        }
                    }
            );
        }else{
            check_pass = false;
        }
    }
</script>
<%= render 'form_edit_mode' %>
<script>
    var textarea = document.getElementById('forum_name');
    autoTextarea(textarea);
    var textarea1 = document.getElementById('forum_desc');
    autoTextarea(textarea1);
    $(function(){
        $('#forum_name').keypress(function(e)
        {
            var n = 0;
            var str = this.value;
            for (i = 0; i < str.length; i++) {
                var leg = str.charCodeAt(i);//ASCII码
                if (leg > 255) {
                    n += 2;
                } else {
                    n += 1;
                }
            }
            if(n >= 160 && e.keyCode != 8)
                if(document.all)
                {
                    e.returnValue = false;
                }
                else
                {
                    e.preventDefault();
                }

        })
    })
</script>