js判断fck编辑器内容是否为空并获得焦点

01 <script type="text/javascript" language="javascript">
02 function confirm()
03 {
04 var textname=document.getElementById("ctl00_ContentPlaceHolder1_TxtName").value;
05 if(textname=="")
06 {
07 alert("您还是留个称呼吧！");
08 document.getElementById("ctl00_ContentPlaceHolder1_TxtName").focus();
09 return false;
10 }
11 return getContentValue();
12 }
13 function getContentValue()
14 {
15 var oEditor =FCKeditorAPI.GetInstance("ctl00_ContentPlaceHolder1_FCKeditor1");
16 var Content=oEditor.GetXHTML();
17 if(Content=="")
18 {
19 alert("您还没有写留言哦！");
20 oEditor.Focus();//获取焦点
21 return false;
22 }
23 }
24 </script>

注意:

其中的"ctl00_ContentPlaceHolder1_FCKeditor1"是生成的静态页面中的FCK的实例名称

src="/Web/fckeditor/editor/fckeditor.html?InstanceName=ctl00_ContentPlaceHolder1_FCKeditor1&amp;

1 <td style="vertical-align:top; text-align:right;">留言内容：</td><td><div><input type="hidden" id="ctl00_ContentPlaceHolder1_FCKeditor1" name="ctl00$ContentPlaceHolder1$FCKeditor1" value="" /><input type="hidden" id="ctl00_ContentPlaceHolder1_FCKeditor1___Config" value="HtmlEncodeOutput=true" /><iframe id="ctl00_ContentPlaceHolder1_FCKeditor1___Frame" src="/Web/fckeditor/editor/fckeditor.html?InstanceName=ctl00_ContentPlaceHolder1_FCKeditor1&amp;Toolbar=Standard" width="90%" height="150px" frameborder="no" scrolling="no"></iframe></div></td>