js 中怎么获取当前系统时间 ?

2023-04-24 07:45:03JavaScript023

js 中怎么获取当前系统时间 ?,第1张

系统时间一般是值服务端时间，js获取服务端时间的方法是直接用ajax获取。

编写显示时间的页面：

<html>

<head>

<title>Server date/time</title>

</head>

var localTime = new Date()

document.write("Local machine time is: " + localTime + "<br>")

document.write("Server time is: " + date)

</script>

<body>

</body>

ajax脚本获取server的时间

var xmlHttp

function srvTime(){

try {

//创建xmlHttp对象

xmlHttp = new XMLHttpRequest()

}

catch (err1) {

//ie浏览器

try {

xmlHttp = new ActiveXObject('Msxml2.XMLHTTP')

}

catch (err2) {

try {

xmlHttp = new ActiveXObject('Microsoft.XMLHTTP')

}

catch (eerr3) {

//ajax不支持

alert("AJAX not supported")

}

//打开xmlHttp请求

xmlHttp.open('HEAD',window.location.href.toString(),false)

//设置xmlHttp请求头

xmlHttp.setRequestHeader("Content-Type", "text/html")

//发送请求

xmlHttp.send('')

// 获取response中的Date参数

return xmlHttp.getResponseHeader("Date")

}

var st = srvTime()//服务器时间赋值给st变量

var date = new Date(st)//转换js的date对象

// 输出服务器时间

document.write("服务器时间: " + date)

拓展资料：

JavaScript一种直译式脚本语言，是一种动态类型、弱类型、基于原型的语言，内置支持类型。它的解释器被称为JavaScript引擎，为浏览器的一部分，广泛用于客户端的脚本语言，最早是在HTML（标准通用标记语言下的一个应用）网页上使用，用来给HTML网页增加动态功能。

语句：JavaScript程序是由若干语句组成的，语句是编写程序的指令。JavaScript提供了完整的基本编程语句，

它们是：赋值语句、switch选择语句、while循环语句、for循环语句、for each循环语句、do...while循环语句、break循环中止语句、continue循环中断语句、with语句、try…catch语句、if语句（if..else，if…else if…）。

我这有一个ASP.NET做的软件里有你要的JS脚本.

//*************************日历控件***************************

// cody by [STAR].sjz 2003-10-31

// 说明:返回值为一个字符串

// 格式如下:

// 使用方法 :

// var dataString = showModalDialog("calendar.htm", "dd日mm月yyyy年" ,"dialogWidth:286pxdialogHeight:221pxstatus:nohelp:no")

var userFormatString

if(window.dialogArguments ==null)

{

userFormatString = "yyyy-mm--dd"

}

else

{

userFormatString = window.dialogArguments

}

with(new Date()){

var Nyear = getYear()

var Nmonth = getMonth() +1

var Ndate = getDate()

}

window.returnValue = new dataObj(Nyear,Nmonth,Ndate ).getDateString(userFormatString)

window.document.onclick = function(){

var obj = window.event.srcElement

if(obj.tagName.toLowerCase() == "span" && obj.parentNode.className.replace(/Ctable/ig,"star") == "star" )

{

try{

window.currentActiveItem.runtimeStyle.cssText = ""

}

catch(e){ }

Nyear = obj.id.split("-")[0]

Nmonth = obj.id.split("-")[1]

Ndate = obj.id.split("-")[2]

window.currentActiveItem = obj

window.currentSelectDate = window.currentActiveItem.id

window.currentActiveItem.runtimeStyle.cssText = "background:url(http://www.5d.cn/bbs/uploadFiles/2003-10/3120401281018.gif) no-repeat 12px 6pxcolor:#000padding-top:1pxfont-weight:bold"

}

window.ftime.Text1.value=""

//window.ftime.Text1.value= window.currentSelectDate+" "+window.ftime.Select1.options[window.ftime.Select1.selectedIndex].text+":"+window.ftime.Select2.options[window.ftime.Select2.selectedIndex].text

window.ftime.Text1.value= window.currentSelectDate

window.returnValue = window.ftime.Text1.value

// window.ftime.Text1.value= window.currentSelectDate

//window.ftime.Text1.value=window.ftime.Text1.value+window.ftime.Select1.options[window.ftime.Select1.selectedIndex].text

}

function dataObj(year,month,date)

{

this.year = year

this.month = month

this.date = date

this.getDateString =

function(formatString)

{

return formatString.replace(/yyyy/ig , this.year).replace(/mm/ig , this.month).replace(/dd/ig , this.date)

}

window.onload = function(){

window.document.attachEvent("onclick" , doCmd)

window.document.attachEvent("onmouseover" , buttonOver)

window.document.attachEvent("onmouseout" , buttonOut)

window.document.attachEvent("onmousedown" , buttonDown)

window.document.attachEvent("onmouseup" , buttonUp)

window.document.attachEvent("ondblclick" ,

function()

{

var obj = window.event.srcElement

if(obj.tagName.toLowerCase() == "span" && obj.parentNode.className.replace(/Ctable/ig,"star") == "star" )

{

var mydate = new dataObj(obj.id.split("-")[0] , obj.id.split("-")[1] , obj.id.split("-")[2] )

window.returnValue = window.ftime.Text1.value

window.close()

}

)

document.all.titleYear.innerHTML=TranYearMonthTitle(Nyear,Nmonth)

document.all.weekNameBox.insertAdjacentHTML("afterBegin",makeWeekNameHtmlStr())

document.all.calendarBox.innerHTML=makeCalendarHtmlStr(Nyear,Nmonth)

window.currentSelectDate = starCaTran(Nyear,Nmonth,Ndate)

window.document.all.calendarBox.show = show

window.currentActiveItem = window.document.getElementById(currentSelectDate)

if( window.currentActiveItem )

window.currentActiveItem.click()

window.document.all.calendarBox.show()

today=new Date()

window.ftime.Select1.selectedIndex=today.getHours()

window.ftime.Select2.selectedIndex=today.getMinutes()

// window.ftime.Text1.value= window.currentSelectDate+" "+window.ftime.Select1.options[window.ftime.Select1.selectedIndex].text+":"+window.ftime.Select2.options[window.ftime.Select2.selectedIndex].text

window.ftime.Text1.value= window.currentSelectDate

window.returnValue = window.ftime.Text1.value

}

function starCalendar(year,month){

this.year = year

this.month = month

this.monthTable = function(){

var aMonth=new Array()

for(i=1i<7i++)aMonth[i]=new Array(i)

var dCalDate=new Date(this.year, this.month-1, 1)

var iDayOfFirst=dCalDate.getDay()

var iDaysInMonth=new Date(this.year, this.month, 0).getDate()

var iOffsetLast=new Date(this.year, this.month-1, 0).getDate()-iDayOfFirst+1

var iDate = 1

var iNext = 1

for (d = 0d <7d++)

aMonth[1][d] = (d<iDayOfFirst)?(-iDayOfFirst+d+1):iDate++

for (w = 2w <7w++)

for (d = 0d <7d++)

aMonth[w][d] = iDate++

return aMonth

}

function makeWeekNameHtmlStr(){

var tmpStr=""

var weekName = ["日","一","二","三","四","五","六"]

for(var i=0i<7i++)tmpStr+="<span class=weekName>"+weekName[i]+"</span>"

return tmpStr

}

function makeCalendarHtmlStr(year,month){

window.theCalendar = new starCalendar(year,month)

var theCaArr = theCalendar.monthTable()

var theDaysInMonth = new Date(year, month, 0).getDate()

var theCaHtml = "<div class=Ctable>"

for(var i=1i<7i++)

for(var j=0j<7j++)

theCaHtml = theCaHtml+"<span class="+( (theCaArr[i][j]<1 || theCaArr[i][j]>theDaysInMonth)?"OtherMonthDate":"Cdate")+" id="+starCaTran(year,month,theCaArr[i][j])+">"+starCaTran(year,month,theCaArr[i][j]).split("-")[2]+"</span>"

return theCaHtml+"</div>"

}

function starCaTran(year,month,date){

with(new Date(year,month-1,date))

return getYear() + "-" +(getMonth()+1) + "-" + getDate()

}

function TranYearMonthTitle(year,month){

with(new Date(year,month-1,1))

return "<span style='text-decoration:underlinecursor:handfont-weight:boldpadding:1 2 0 1width:40px' onclick=showMore(1940,2050,this.innerHTML) onmouseover=\"this.runtimeStyle.cssText='color:#fff'\" onmouseout=\"this.runtimeStyle.cssText=''\" onpropertychange=showC()>" + getYear() + "</span>" + "年" + "<span style='text-decoration:underlinecursor:handfont-weight:boldpadding:1 2 0 1width:20px' onclick=showMore(1,12,this.innerHTML) onmouseover=\"this.runtimeStyle.cssText='color:#fff'\" onmouseout=\"this.runtimeStyle.cssText=''\" onpropertychange=showC()>" + (getMonth()+1) + "</span>" + "月"

}

function showC(){

if(event.propertyName != "innerHTML")return

window.theCalendar.year = new Number(document.all.titleYear.getElementsByTagName("span")[0].innerHTML)

window.theCalendar.month = new Number(document.all.titleYear.getElementsByTagName("span")[1].innerHTML)

window.document.all.calendarBox.innerHTML=makeCalendarHtmlStr(window.theCalendar.year,window.theCalendar.month)

window.document.all.calendarBox.show = showwindow.document.all.calendarBox.show()

}

function showMore(starNum,endNum,selectedValue){

var obj = window.event.srcElement

var selectedIndex = selectedValue - starNum

if(obj.selectBox){

obj.selectBox.selectedIndex = selectedIndex

return obj.selectBox.show(document.all.calendarBox.offsetHeight + document.all.weekNameBox.offsetHeight )

}

var selectBox = window.document.createElement("div")

selectBox.className = "selectBox"

selectBox.style.height = 0

selectBox.style.top = window.event.clientY - window.event.offsetY + window.event.srcElement.offsetHeight

selectBox.style.left = window.event.clientX - window.event.offsetX

selectBox.show = showBox

selectBox.selectedIndex = selectedIndex

selectBox.onclick = function(){

var selectedObj = window.event.srcElement

if( "nobr" == selectedObj.tagName.toLowerCase() &&selectBox.contains(selectedObj))

{

if(obj.innerHTML != selectedObj.innerHTML)obj.innerHTML = selectedObj.innerHTML

}

selectBox.onlosecapture = alert

var iString = ""

for(var i=starNumi<=endNumi++){

iString += "<nobr onmouseover=\"this.parentNode.getElementsByTagName('nobr')[this.parentNode.selectedIndex].style.cssText=''this.style.cssText='background-color:#00006Ccolor:#fff'\" onmouseout=this.style.cssText=''>"+i+"</nobr><br>"

}

selectBox.insertAdjacentHTML ("afterBegin",iString)

window.document.body.appendChild(selectBox)

obj.selectBox = selectBox

obj.selectBox.show(document.all.calendarBox.offsetHeight + document.all.weekNameBox.offsetHeight )

}

function showBox(iHeight)

{

var box = this

box.style.height =1

box.style.display = "block"

window.clearInterval(box.timeHandle)

box.timeHandle = window.setInterval(interValHandle,1)

var s = 0,t =1

function interValHandle()

{

box.scrollTop=1000000

s = s + t*t

t += 0.5

box.style.height = parseInt(box.style.height) + Math.floor(s)

box.style.width = 65 / iHeight * box.offsetHeight

if( box.offsetHeight >iHeight )

{

window.clearInterval(box.timeHandle)

box.style.height = iHeight

box.scrollTop = box.childNodes[0].offsetHeight*box.selectedIndex

box.getElementsByTagName("nobr")[box.selectedIndex].style.cssText='background-color:#00006Ccolor:#fff'

window.document.attachEvent("onclick",

box.hide=function()

{

box.style.display = "none"

window.document.detachEvent("onclick",box.hide)

}

)

}

</script>

function buttonOver(){

var obj = window.event.srcElement

if(obj.tagName.toLowerCase() == "span" && obj.className.replace(/controlButton/ig,"star") == "star" )

{

obj.runtimeStyle.cssText="border-color:#fff #606060 #808080 #fffpadding:3 0 0 0 "

}

if(obj.tagName.toLowerCase() == "span" && obj.parentNode.className.replace(/Ctable/ig,"star") == "star" )

{

obj.style.backgroundColor = "#fff"

}

function buttonOut(){

var obj = window.event.srcElement

if(obj.tagName.toLowerCase() == "span" && obj.className.replace(/controlButton/ig,"star") == "star" )

{

obj.runtimeStyle.cssText = ""

}

if(obj.tagName.toLowerCase() == "span" && obj.parentNode.className.replace(/Ctable/ig,"star") == "star" )

{

window.setTimeout(function(){obj.style.backgroundColor = ""},300)

}

function buttonDown(){

var obj = window.event.srcElement

if(obj.tagName.toLowerCase() == "span" && obj.className.replace(/controlButton/ig,"star") == "star" )

{

obj.setCapture()

obj.runtimeStyle.borderColor="#808080 #fefefe #fefefe #808080"

}

function buttonUp(){

var obj = window.event.srcElement

if(obj.tagName.toLowerCase() == "span" &&obj.className.replace(/controlButton/ig,"star") == "star" )

{

obj.releaseCapture()

obj.runtimeStyle.cssText =""

}

function doCmd(){

var obj = window.event.srcElement

if(obj.tagName.toLowerCase() == "span" &&obj.className.replace(/controlButton/ig,"star") == "star" )

{

switch(obj.getAttribute("cmd"))

{

case "py":

window.document.all.titleYear.innerHTML=window.TranYearMonthTitle(window.theCalendar.year-1,window.theCalendar.month)

window.document.all.calendarBox.innerHTML=makeCalendarHtmlStr(window.theCalendar.year-1,window.theCalendar.month)

break

case "pm":

window.document.all.titleYear.innerHTML=window.TranYearMonthTitle(window.theCalendar.year,window.theCalendar.month-1)

window.document.all.calendarBox.innerHTML=makeCalendarHtmlStr(window.theCalendar.year,window.theCalendar.month-1)

break

case "nm":

window.document.all.titleYear.innerHTML=window.TranYearMonthTitle(window.theCalendar.year,window.theCalendar.month+1)

window.document.all.calendarBox.innerHTML=makeCalendarHtmlStr(window.theCalendar.year,window.theCalendar.month+1)

break

case "ny":

window.document.all.titleYear.innerHTML=window.TranYearMonthTitle(window.theCalendar.year+1,window.theCalendar.month)

window.document.all.calendarBox.innerHTML=makeCalendarHtmlStr(window.theCalendar.year+1,window.theCalendar.month)

break

}

window.document.all.calendarBox.show()

window.currentSelectDate = starCaTran(Nyear,Nmonth,Ndate)

window.currentActiveItem = window.document.getElementById(currentSelectDate)

if( window.currentActiveItem )window.currentActiveItem.runtimeStyle.cssText = "background:url(choiceit.gif) no-repeat 12px 6pxcolor:#000padding-top:1pxfont-weight:bold"

}

function show()

{

var box = this

window.clearTimeout(box.timeHandle)

var CdateBoxs = this.getElementsByTagName("span")

for(var i=0i<CdateBoxs.lengthi++)

{

CdateBoxs[i].defaultValue = new Number( CdateBoxs[i].innerHTML )

CdateBoxs[i].innerHTML = 0

}

showDate()

function showDate(){

for(var i=0i<CdateBoxs.lengthi++){

if( new Number( CdateBoxs[i].innerHTML ) + 1 <= new Number( CdateBoxs[i].defaultValue ) )

CdateBoxs[i].innerHTML = new Number( CdateBoxs[i].innerHTML ) + 1

}

box.timeHandle = window.setTimeout(showDate,1)

}

this.show = show1

}

function show1()

{

var box = this

window.clearTimeout(box.timeHandle)

var CdateBoxs = this.getElementsByTagName("span")

for(var i=0i<CdateBoxs.lengthi++)CdateBoxs[i].style.display = "none"

showDate(CdateBoxs[0])

function showDate(obj){

if( !obj )return

obj.style.display = "inline"

box.timeHandle = window.setTimeout(function(){showDate(obj.nextSibling)},1)

}

this.show = show

}

function show()

{

}

</script>

body{ background-color:#e5eaa0overflow:hiddenmargin:0border:0px}

#titleYear{ text-align:centerpadding-top:3pxwidth:120pxheight:20pxborder:solid #E5E9F2border-width:0px 1px 1px 0pxbackground-color:#97ca00color:#000cursor:default}

#weekNameBox{ width:282pxborder-bottom:0}

.weekName{ text-align:centerpadding-top:4pxwidth:40pxheight:20pxborder:solid #E5E9F2border-width:0px 1px 1px 0pxbackground-color:#C0D0E8color:#243F65cursor:default}

.controlButton{ font-family: Webdingsfont:9pxtext-align:centerpadding-top:2pxwidth:40pxheight:20pxborder:solid #E5E9F2border-width:0px 1px 1px 0pxbackground-color:#95ca00color:#243F65cursor:default}

.Ctable{ width:282pxmargin-bottom:20px}

.Ctable span{ font:9px verdanafont-weight:boldcolor:#243F65text-align:centerpadding-top:4pxwidth:40pxheight:26pxborder:solid #C0D0E8border-width:0px 1px 1px 0pxcursor:default}

.Cdate{ background-color:#b4dad6}

.Ctable span.OtherMonthDate{ color:#999background-color:#f6f6f6}

.selectBox{ cursor:handfont:9px verdanawidth:80pxposition:absoluteborder:1px solid #425E87overflow-y:scrolloverflow-x:hiddenbackground-color:#fffFILTER:progid:DXImageTransform.Microsoft.Shadow(Color=#999999,offX=10,offY=10,direction=120,Strength=5)SCROLLBAR-FACE-COLOR: #E5E9F2SCROLLBAR-HIGHLIGHT-COLOR: #E5E9F2SCROLLBAR-SHADOW-COLOR: #A4B9D7SCROLLBAR-3DLIGHT-COLOR: #A4B9D7SCROLLBAR-ARROW-COLOR: #000000SCROLLBAR-TRACK-COLOR: #eeeee6SCROLLBAR-DARKSHADOW-COLOR: #ffffff}

.selectBox nobr{ padding:0px 0px 2px 5pxwidth:100%color:#000letter-spacing:2pxtext-decoration:none}

</style>

</div>

<font>