各种常用的JS函数整理_基础知识-js-Tutorial-php.cn

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各种常用的JS函数整理_基础知识

May 16, 2016 pm 05:18 PM

常用函数

Js获取页面地址参数

复制代码代码如下:

 
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

复制代码代码如下:

 
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

复制代码代码如下:

 
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

复制代码代码如下:

 
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

复制代码代码如下:

 
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 pos_decimal = s_x.length; 
s_x += '.'; 
} 
while (s_x.length 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

复制代码代码如下:

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

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

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

if (month if (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

复制代码代码如下:

 
function NowTimeCode() 
{ 
var Result=""; 

var now = new Date(); 

var year = now.getYear(); 

if (now.getYear() 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 if (day if (hour if (minutes if (second 
if (millisecond millisecond = "00"+ millisecond; 
else 
{ 
if (millisecond { 
millisecond = "0"+ millisecond; 
} 
} 

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

return Result; 

} 

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