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// 입력 내용 받기 = CKEDITOR.instances.textarea태그의id.getData();
if(CKEDITOR.instances.cntnt.getData() =='' 
        || CKEDITOR.instances.cntnt.getData().length ==0){
    alert("내용을 입력해주세요.");
    $("#cntnt").focus();
    return false;
}
cs

 

출처 : https://stackoverrun.com/ko/q/11691633

 

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