各种常用的JS函数_varpn-优快云博客

本文链接：https://blog.youkuaiyun.com/fishsoftdotnet/article/details/13000893

本文介绍了一系列JavaScript实用技巧，包括获取URL参数、页面跳转、数字格式化、日期处理等，适用于网页开发中常见需求。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Js获取页面地址参数

function getUrlPara(paraName)
{
    var sUrl = location.href;
    var sReg = "(?://?|&){1}" + paraName + "=([^&]*)"
    var re = new RegExp(sReg, "gi");
    re.exec(sUrl);
    return RegExp.$1;
}

地址跳转

var pn = $("#gotopagenum").val();//#gotopagenum是文本框的id属性  
location.href = "NewList.aspx?pagenum="+pn;//location.href实现客户端页面的跳转

千分位

function Convert(money)
{
    var s = money; //获取小数型数据
    s += "";
    if (s.indexOf(".") == -1) s += ".00"; //如果没有小数点，在后面补个小数点和00
    if (/\.\d$/.test(s)) s += "0";   //正则判断
        while (/\d{4}(\.|,)/.test(s))  //符合条件则进行替换
        s = s.replace(/(\d)(\d{3}(\.|,))/, "$1,$2"); //每隔3位添加一个
        return s;
    }

判断是否数字

function IsNumeric(txt) {
    if (txt == "") {
        return false;
    }

    if (txt.indexOf(",") > 0) {
        txt = txt.replace(",", "");
    }

    if (isNaN(txt)) {
        return false;
    }
    else {
        return true;
    }
}

将数字进行两位小数的格式化

function changeTwoDecimal_f(x) {
    var f_x = parseFloat(x);
    if (isNaN(f_x)) {
        alert('function:changeTwoDecimal->parameter error');
        return false;
    }
    f_x = Math.round(f_x * 100) / 100;
    var s_x = f_x.toString();
    var pos_decimal = s_x.indexOf('.');
    if (pos_decimal < 0) {
        pos_decimal = s_x.length;
        s_x += '.';
    }
    while (s_x.length <= pos_decimal + 2) {
        s_x += '0';
    }
    return s_x;
}

Js 进行数字运算的函数 parseFloat parseInt

js 当前日期 yyyy-mm-dd 预置查询条件

    var now = new Date();
    var year = now.getYear();

    if (now.getYear() < 1900) {
        year = now.getYear() + 1900;
    }

    var month = now.getMonth() + 1;
    var day = now.getDate();

    if (month < 10) month = "0" + month;
    if (day < 10) day = "0" + day;
    
    $("#txtDate1").val(year.toString() + "-" + month.toString() + "-01");
    $("#txtDate2").val(year.toString() + "-" + month.toString() + "-" + day.toString());

Js 获取时间戳，在某些情景下代替Guid

function NowTimeCode()
{
    var Result="";
    
    var now = new Date();

    var year = now.getYear();

    if (now.getYear() < 1900) {
        year = now.getYear() + 1900;
    }

    var month = now.getMonth() + 1;
    var day = now.getDate();
    var hour = now.getHours();
    var minutes = now.getMinutes();
    var second = now.getSeconds();
    var millisecond = now.getMilliseconds();

    if (month < 10) month = "0" + month;
    if (day < 10) day = "0"+ day;
    if (hour < 10) hour = "0"+ hour;
    if (minutes < 10) minutes = "0"+ minutes;
    if (second < 10) second = "0"+ second;

    if (millisecond < 10) 
        millisecond = "00"+ millisecond;
    else
    {
        if (millisecond < 100)
        {
            millisecond = "0"+ millisecond;
        }
    }

    Result = year.toString() + month.toString() + day.toString() + hour.toString() + minutes.toString() + second.toString() + millisecond.toString();

    return Result;

}