js擷取fck文本編輯器内的内容，不包括html标簽在内

 //取fck内容的長度

function GetLength(str) {

var oEditor = FCKeditorAPI.GetInstance(str);

var checkContent = oEditor.EditorDocument;

var contentLength;

if (document.all) {

contentLength = trim(checkContent.body.innerText).length;

}

else {

var r = checkContent.createRange();

r.selectNodeContents(checkContent.body);

contentLength = trim(r).length;

}

return contentLength

}