Compilation of various commonly used JS functions_Basic knowledge

Js gets the page address parameter

Copy code The code is as follows:

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

Address jump

Copy code The code is as follows:

var pn = $("#gotopagenum").val();//#gotopagenum It is the id attribute of the text box
location.href = "NewList.aspx?pagenum=" pn;//location.href realizes the jump of the client page

Thousandth place

Copy code The code is as follows:

function Convert(money)
{
var s = money; //Get decimal data
s = "";
if (s.indexOf(".") == -1) s = ".00"; //If there is no decimal point, add it at the end decimal point and 00
if (/.d$/.test(s)) s = "0"; //Regular judgment
while (/d{4}(.|,)/.test(s )) //Replace if conditions are met
s = s.replace(/(d)(d{3}(.|,))/, "$1,$2"); //Add every 3rd digit
return s;
}

Judge whether it is a number

Copy code The code is as follows :

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

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

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

Format the number to two decimal places

Copy code The code is as follows:

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 function parseFloat parseInt for numerical operations

js current date yyyy-mm-dd preset query conditions

Copy code The code is as follows:

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 gets the timestamp, replacing Guid in some scenarios

Copy code The code is as follows:

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;

}