本文实例为大家分享了javascript实现简单页面倒计时的具体代码,供大家参考,具体内容如下
话不多说,直接贴代码
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<!DOCTYPE html>
< html >
< head >
< meta charset = "utf-8" >
< style type = "text/css" >
body
{
color:red;
text-align: center;
}
.one{
color:black;
text-align:center;
}
</ style >
</ head >
< body >
< p >
日期倒计时< br >
请输入目标日期并点击按钮,实现目标日期的倒计时!
</ p >
< form name = "form1" >
< input type = "text" id = "a" size = 1 name = "a" >年
< input type = "text" id = "b" size = 1 name = "b" >月
< input type = "text" id = "c" size = 1 name = "c" >日
< input type = "text" id = "d" size = 1 name = "d" >时
< input type = "text" id = "e" size = 1 name = "e" >分
< input type = "text" id = "f" size = 1 name = "f" >秒
< br >
< div id = "time" value = "时间" ></ div >
< script >
function getdate(clock){
var now=new Date();
var y=now.getFullYear()
var m=now.getMonth()
var d=now.getDate()
var day=now.getDay()
var h=now.getHours()
var minu=now.getMinutes()
var s=now.getSeconds()
m+=1;
var array=new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六")
var nowtime=y+"年"+m+"月"+d+"日 "+array[day]+" "+h+"时"+minu+"分"+s+"秒";
clock.innerHTML="当前时间:"+nowtime;
}
window.onload=function(){
window.setInterval("getdate(time)",1000)
}
</ script >
< input type = "button" value = "倒计时" onclick = "leftTime()" >:
距离目标日期还有:
< input type = "text" id = "cha" >
< script >
var flag=1;var t;
function leftTime(){
if(flag==0){flag=1;}
year=document.getElementById("a").value;
month=document.getElementById("b").value;
day=document.getElementById("c").value;
hour=document.getElementById("d").value;
minute=document.getElementById("e").value;
second=document.getElementById("f").value;
var leftTime = (new Date(year,month-1,day,hour,minute,second)) - (new Date());
//计算剩余的毫秒数
if(leftTime>0){
var days = parseInt(leftTime/1000/60/60/24,10); //计算剩余的天数
var hours = parseInt(leftTime/1000/60/60%24,10); //计算剩余的小时
var minutes = parseInt(leftTime/1000/60%60,10);//计算剩余的分钟
var seconds = parseInt(leftTime/1000%60,10);//计算剩余的秒数
document.getElementById("cha").value=days+"天" + hours+"小时" + minutes+"分"+seconds+"秒";
}
else{
document.getElementById("cha").value="0天0小时0分0秒";
alert("主人,时间到啦!")
flag=0;clearInterval(t);
}
if(flag==1){
t=setInterval("leftTime()",1000);
flag=2;
}
}
</ script >
</ form >
</ body >
</ html >
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第一次写完测试的时候,发现时间到了之后页面一直不断弹出提示框,后面百度了下发现每调用一次setInterval周期性调用函数就要设置一次clearInterval来关闭,于是通过设置flag来实现;最终代码如上所示。运行结果如下:
时间到:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/weixin_36413887/article/details/77816333