JavaScript implements a simple countdown pop-up window DEMO with pictures_javascript skills

I recently made a simple settings web page. Because I needed to restart the device function, I wanted to add a countdown pop-up interface to it.

The initial idea was to customize an alert pop-up window, but I soon discovered that the alert would always stay there waiting for click confirmation, rather than the automatic and continuous display effect I wanted.

Later, I thought that it would be possible to directly display and hide pop-up windows made from DIVs. Based on this idea, we have the following:

First look at the rendering:


Then look at the source code:

Copy code The code is as follows:

Preparing

Working hard to prepare for your reboot... Please wait4 seconds

Cancel< /div>

In progress

Restart operation In progress... Please wait14 seconds

< div id="progress_reboot" style="margin-left:40px;color:#00DB00;font-family:Arial;font-weight:bold;height:18px">|

lt;script type="text/javascript">

var cancel_flag = 0;
var already = 0;

/* Operation performed as soon as the web page is loaded*/
window.onload = reboot();

/* Click operation of the restart button*/
function reboot(){
if(confirm("This operation will disconnect all current connections and restart your device. Are you sure you want to continue? ")){
document.getElementById("reboot_pre_time").innerHTML = 4;
document.getElementById("reboot_ing_time").innerHTML = 14;
document.all.progress_reboot.innerHTML = "|" ;
download_flag = 0;
cancel_flag = 0;
already = 0;
setTimeout("showDiv('reboot_pre')",500);
delayPre_reboot("reboot_pre_time");
}
}
/* Timer the restart preparation pop-up window for 5 seconds*/
function delayPre_reboot(str) {
if(!cancel_flag){
var delay = document.getElementById(str ).innerHTML;
if(delay > 0) {
delay--;
document.getElementById(str).innerHTML = delay;
setTimeout("delayPre_reboot('reboot_pre_time')", 1000);
} else {
hideDiv("reboot_pre");
setTimeout("showDiv('reboot_ing')",500);
delayDo_reboot("reboot_ing_time");
}
}
}
/* Restart pop-up window in progress for 15 seconds*/
function delayDo_reboot(str){
display_reboot(100);
var delay = document.getElementById( str).innerHTML;
if(delay > 0) {
delay--;
document.getElementById(str).innerHTML = delay;
setTimeout("delayDo_reboot('reboot_ing_time')" , 1000);
} else {
hideDiv("reboot_ing");
alert("Reboot successfully! ");
}
}
/* Event of cancel button during reboot preparation*/
function reboot_cancel(){
cancel_flag = 1;
hideDiv("reboot_pre");
alert("You have successfully canceled the restart operation!");
}
/* Show pop-up window*/
function showDiv (str){
document.getElementById(str). style.visibility = "visible";
}
/* Hide pop-up window*/
function hideDiv (str){
document.getElementById(str).style.visibility = "hidden";
}

/* Restart pop-up window timing and buffer bar movement*/
function display_reboot(max){
already;
var dispObj = document.all.progress_reboot;
dispObj.style.width = 100.0*already/max "px";
document.all.progress_reboot.innerHTML = "||||";
var timer = window.setTimeout("display( " max ")",1000);
if (already >= max){
window.clearTimeout(timer);
}
}