js判断FCKeditor内容是否为空的二种方法

FCKeditor内容是否为空在提交表单时一定要判断的，分享二个方法。
方法1，

function checkFCK(key)
{
var oEditor=FCKeditorAPI.GetInstance(key);
var content=oEditor.GetXHTML(true);
content=content.replace(/　/g,"");
content=content.replace(/s/g,"");
content=content.replace(/ /g,"");
content=content.replace(/<br/>/g,"");
content=content.replace(/<p></p>/g,"");
content=content.replace(/<div></div>/g,"");
if(content==null||content==""){
oEditor.SetHTML("");
return false;
}
return true;
}

方法2，

function GetMessageLength(str)
{
var oEditor = FCKeditorAPI.GetInstance(str) ;
var oDOM = oEditor.EditorDocument ;
var iLength ;
if ( document.all ) // If Internet Explorer.
{
iLength = oDOM.body.innerText.length ;
}
else // If Gecko.
{
var r = oDOM.createRange() ;
r.selectNodeContents( oDOM.body ) ;
iLength = r.toString().length ;
}
return iLength
}