fck如何判断内容是否为空

function sendForm(){
				var ftitle = $.trim($("#ftitle").val());
				var fcontent = getContentValue("fcontent");
				if(ftitle==""){
					$("#tspan").css("color","red").html("标题不能为空！");
					return false;
				}
				if(!fcontent){
					$("#cspan").css("color","red").html("爆料内容不能为空！");
					return false;
				}
				return true;
			}
			 function getContentValue(fckid){
				 var oEditor =FCKeditorAPI.GetInstance(fckid);
				 var Content=$.trim(oEditor.GetXHTML());
				 if(Content=="") { 
					 oEditor.Focus();//获取焦点 
					 return false;
				}
				return true;
			}