在已有textarea且其name属性值已设置的情况下，让name属性保持原样，否则设置为id+"-markdown-doc"

editormd.js

@@ -403,8 +403,10 @@
                 editor.append("<textarea></textarea>");
                 markdownTextarea = this.markdownTextarea = editor.children("textarea");
             }
-            
-            markdownTextarea.addClass(classNames.textarea.markdown).attr("name", id + "-markdown-doc").attr("placeholder", settings.placeholder);
+            if(markdownTextarea.attr("name")=="undefined"||markdownTextarea.attr("name")==""){
+				markdownTextarea.attr("name", id + "-markdown-doc");
+			}
+            markdownTextarea.addClass(classNames.textarea.markdown).attr("placeholder", settings.placeholder);
 
             var appendElements = [
                 (!settings.readOnly) ? "<a href=\"javascript:;\" class=\"fa fa-close " + classPrefix + "preview-close-btn\"></a>" : "",