//判断fck的内容是否为空 var oEditor = FCKeditorAPI.GetInstance('content'); //这里的content是FCK的ID值 if(GetLength("content")<=0) { alert('内容不能为空!'); oEditor.Focus(); return false; } function GetLength(str){ var oEditor = FCKeditorAPI.GetInstance(str) ; var checkContent= oEditor.EditorDocument ; var contentLength ; if ( document.all ){ contentLength= checkContent.body.innerText.trim().length ; } else{ var r = checkContent.createRange() ; r.selectNodeContents( checkContent.body ) ; contentLength= r.toString().trim().length ; } return contentLength; } //去掉字符串的空格 String.prototype.trim = function() { return this.replace(/(^[\s]*)|([\s]*$)/g, ""); }