 if (bookContentUrl.length == 0) {
            layer.alert("小说内容页的URL规则必填");
            return false;
        }

        crawlRule.bookContentUrl = bookContentUrl;

        var contentStart = $("#contentStart").val();

        if (contentStart.length == 0) {
            layer.alert("小说内容开始截取字符串必填");
            return false;
        }
        crawlRule.contentStart = contentStart;

        var contentEnd = $("#contentEnd").val();

        if (contentEnd.length 