发布于 2017-01-18 02:03:58 | 196 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Javascript教程，程序狗速度看过来！

JavaScript客户端脚本语言

Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。

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本篇文章主要是对js日期、星座的级联显示代码进行了介绍，需要的朋友可以过来参考下，希望对大家有所帮助

js 代码

    function birthdayOnchange(obj) {
        var year = $("<%= DDL_Year.ClientID%>").value;

        if (year == "year")
            return;
        else
            year = parseInt(year, 10);

        var month = $("<%=DDL_Month.ClientID%>").value;
        if (month == "month")
            return;
        else
            month = parseInt(month, 10);

        var day = $("<%=DDL_Day.ClientID%>").value;
        var wholeday = getDays(year, month);

        if (1) {
            var options = $("<%=DDL_Day.ClientID%>").options;
            for (var i = 1; i <= wholeday; i++) {
                var j = i.toString();
                j = j.length == 1 ? "0" + j : j;
                options.length = i + 1;
                options[i].value = j;
                options[i].text = j;
                if (day <= wholeday && i == day) {
                    options[i].selected = true;
                }
            }
        }
    }

 function getDays(year, month) {
        var dayarr = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

        if (month == 2) {
            if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0 || year < 1900)
                return 29;
            else
                return dayarr[month - 1];
        }
        else {
            return dayarr[month - 1];
        }
    }

    function adjustAstro() {
        var v_astro = getAstro($("<%=DDL_Month.ClientID%>").value, $("<%=DDL_Day.ClientID%>").value);
        $("<%=astro.ClientID %>").options[0].text = v_astro;
    }

    function getAstro(v_month, v_day) {
        v_month = parseInt(v_month, 10)
        v_day = parseInt(v_day, 10);

        if ((v_month == 12 && v_day >= 22)
  || (v_month == 1 && v_day <= 20)) {
            return "魔羯座";
        }
        else if ((v_month == 1 && v_day >= 21)
  || (v_month == 2 && v_day <= 19)) {
            return "水瓶座";
        }
        else if ((v_month == 2 && v_day >= 20)
  || (v_month == 3 && v_day <= 20)) {
            return "双鱼座";
        }
        else if ((v_month == 3 && v_day >= 21)
  || (v_month == 4 && v_day <= 20)) {
            return "白羊座";
        }
        else if ((v_month == 4 && v_day >= 21)
  || (v_month == 5 && v_day <= 21)) {
            return "金牛座";
        }
        else if ((v_month == 5 && v_day >= 22)
  || (v_month == 6 && v_day <= 21)) {
            return "双子座";
        }
        else if ((v_month == 6 && v_day >= 22)
  || (v_month == 7 && v_day <= 22)) {
            return "巨蟹座";
        }
        else if ((v_month == 7 && v_day >= 23)
  || (v_month == 8 && v_day <= 23)) {
            return "狮子座";
        }
        else if ((v_month == 8 && v_day >= 24)
  || (v_month == 9 && v_day <= 23)) {
            return "处女座";
        }
        else if ((v_month == 9 && v_day >= 24)
  || (v_month == 10 && v_day <= 23)) {
            return "天秤座";
        }
        else if ((v_month == 10 && v_day >= 24)
  || (v_month == 11 && v_day <= 22)) {
            return "天蝎座";
        }
        else if ((v_month == 11 && v_day >= 23)
  || (v_month == 12 && v_day <= 21)) {
            return "射手座";
        }
        return "";
    }

                <DIV>出生日期：</DIV>
                <DIV>
                    <asp:DropDownList ID="DDL_Year" runat="server"  onchange="birthdayOnchange(this);"></asp:DropDownList> 年 
                    <asp:DropDownList ID="DDL_Month" runat="server"  onchange="birthdayOnchange(this);adjustAstro();"></asp:DropDownList> 月 
                    <asp:DropDownList ID="DDL_Day" runat="server" onchange="adjustAstro();"></asp:DropDownList> 日 
                </DIV>

                <DIV>星座：</DIV>
                <DIV>
                    <SELECT id=astro disabled name=astro runat="server"> 
                        <OPTION selected>处女座</OPTION>
                    </SELECT>
                </DIV>