javascript Kopírování textu - zabránění

Ukázky zaokrouhlení čísla v JavaScript.

var num = 123.45678;
var rounded = Math.round(num); // out: 123
 
var num = 123.5269;
var rounded = Math.round(num); // out: 124

var num = -3.5269;
var rounded = Math.round(num); // out: -4

var num = 3.5269;
var rounded = Math.round(num * 100)/100; // out: 3.52

var num = 3.5269;
var rounded = Math.round(num * 1000)/1000; // out: 3.526

var num = 3.5269;
var rounded = num.toFixed(3); // out: 3.527

c:xampphtdocs

HTML TAGS EXAPLES

<a href="#bla">bla target</a>
invisible target 
<a name="bla">bla</a> 
 OR visible target
<h2 id="bla"></h2>
JavaScript
var elmnt = document.getElementById("bla");
elmnt.scrollIntoView();

Invisible hidden collabsible toggle switch DIV

<div id="idDiv">Hello</div>
// javascript button onclick
if(show){
 idDiv.style.display === "block";
}else{
 idDiv.style.display = "none";
}

RewriteEngine On



RewriteBase / 
# //localhost/internet/download.php?ds=NECO zadana adresa

# QUERY_STRING  je vse za otaznikem tedy ds=NECO

# kdyz query string zacina ds=(NECO) a uz za nim neni vubec nic, zadny dalsi &val=value ^& 


RewriteCond %{QUERY_STRING} ^ds=([^&]+)$


# tak download.php nahradit za %1-download-data-link.html? pricemz %1 je to co se vybraloz za ds=, tedy NECO

# R=301 je presmerovani takze znovu to posle na web ke kontrole napr. do tohoto souboru kdyz je adresa na tento web
# L .. last .. posila adresu ke kontrole na web. adresa bude  NECO-download-data-link.html



RewriteRule ^download\.php$ %1-download-data-link.html? [R=301,L,NE]



# pri dalsi kontrole prevede NECO-download-data-link.html zpet na download.php?rw=3&ds=NECO a uz to hleda v adresarich

# ale v adresnim radku prohlizece uz zustane ta prichozi NECO-download-data-link.html

#QSA prida query string, bude se pak jeste hodit. rw=3 muzeme pak odchytit v php ALE hlavne brani cykleni, jinak
# by to odchytil zase znovu RewriteCond %{QUERY_STRING} ^ds=([^&]+)$  kdyby tam zustal jen ds=NECO



RewriteRule ^([^/]+)-download-data-link\.html$ download.php?rw=3&ds=$1 [L,QSA]

 <script>



        var mbThreadOneRunning = false;
        var mbThreadOneEnded = false;

        var mbThreadTwoRunning = false;
        var mbThreadTwoEnded = false;

        // you can create more than one Thread 
        // setTimeout() used for running more Threads at once
        var timeout_1 = setTimeout("ThreadOne()", 5000); // 5000 == 5 second
        var timeout_2 = setTimeout("ThreadTwo()", 3000); // 

        function ThreadOne() {
            mbThreadOneRunning = true;
            alert("1. ThreadOne working!");
            // working code here .............
            mbThreadOneEnded = true;
            clearTimeout(timeout_1);
        }

        function ThreadTwo() {
            mbThreadTwoRunning = true;
            alert("2. ThreadTwo working!");
            // working code here .............
             mbThreadTwoEnded = true;
            clearTimeout(timeout_2);
        }


        var mInterval = setInterval("checkThread()", 1000); // 1000 ms == 1 second, you can put smaller value

        function checkThread() {
            if (mbThreadOneEnded == true) {                
                alert("1. checkThread() ThreadOne finish work! " + mbThreadOneEnded);
            }
            else if (mbThreadTwoEnded == true) {
                alert("2. checkThread() ThreadTwo  finish work! " + mbThreadTwoEnded);
            }
            if (mbThreadOneEnded && mbThreadTwoEnded) {
                clearInterval(mInterval); // just to be sure
                mbThreadOneEnded = false;
                mbThreadTwoEnded = false;
                alert("ThreadOne and ThreadTwo ended ");
            }

        }


    


    </script>

Timer in javascript example source code will opening random link in random time.

// setTimeout() 
// clearTimeout()

var start = new Date();

function timedCount()
{
 var now = new Date();
 var resultMilliSeconds = now.getTime() - start.getTime();
 // create some div with id txt
 document.getElementById('txt').innerHTML = resultMilliSeconds;
}
var t = setTimeout("timedCount()",1000);
// clearTimeout(t); // for stopping create button with onclick clearTimeout(t)

Použití timeru v javasciptu. Příklad otvírá náhodně náhodný odkaz v okně prohlížeče za náhodný časový interval.

var c=0;
var t = new String().toString();
var t2 = new String().toString();
var timer_is_on=0;
var newWindow;
function open2(url, opt){
  if (opt == 0) // current window
    window.location = url;
  else if (opt == 1){ // new window
   if(newWindow) newWindow.open(url,"_parent");
   else
   newWindow = window.open(url);
   
   }
  else if (opt == 2) // background window
    {window.open(url); self.focus();}
}
var ar = new Array (
"https://www.okhelp.cz/polevky/"
,"https://www.okhelp.cz/auto-moto/"
,"https://www.okhelp.cz/pc-mobily/"
);

function timedCount()
{
var randomnumber=Math.floor(Math.random()*ar.length)
open2(ar[randomnumber],1);

document.getElementById('txt').value=c;
c=c+1;
t=setTimeout("timedCount()",1000 * (randomnumber + 4));

}

function doTimer()
{
if (!timer_is_on)
  {
  timer_is_on=1;
  timedCount();
  
  }
}

function stopCount()
{
clearTimeout(t);
clearTimeout(t2);

timer_is_on=0;
}    
    </script>
    
    
</head>
<body>

<form>
<input type="button" value="Start count!" onClick="doTimer()">
<input type="text" id="txt">
<input type="button" value="Stop count!" onClick="stopCount()">
</form>