ajax 传递长文本传不到后台

$.ajax({
type:"post",
url:encodeURI("updateCarTrick.do"),
contentType:"application/x-www-form-urlencoded; charset=utf-8",
data: "title="+title+"&content="+content+"&car_trick_id="+car_trick_id,
success: function(data){
if(data.flag==1) {
alert("保存成功");
} else if(data.flag==0) {
alert("保存失败");
} else{
alert("出错");
}
}
}
);
}

ajax怎么把长字符串文本发送到后台

http://q.cnblogs.com/q/58686/