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    <p>To answer the question, to get something like a sleep function you could just write somehting like this as a helper function</p> <pre><code>function sleep(dur) { var d = new Date().getTime() + dur; while(new Date().getTime() &lt;= d ) { //Do nothing } } console.log(new Date().getTime()) sleep(1000) console.log(new Date().getTime()) </code></pre> <p>Then you <em>could</em> call the <code>sleep</code> function after every iteration like</p> <pre><code>function abc(){ for(i=1;i&lt;=10;i++){ document.write(i+"&lt;br&gt;"); sleep(1000); } } </code></pre> <p>But Note that <code>sleep</code> will freeze your browser in this time and you don't really wan't this kind of behaviour when you just want to periodiccally do sth</p> <p><code>window.setInterval</code> would be what you want in such cases</p> <pre><code> function abcd(i){ document.write(i + "&lt;br&gt;") } function repeatedTimeout(func,times,duration) { var args = Array.prototype.slice.call(arguments).splice(3); var i = 0; args.push(i) var wrap = function () { if(args[args.length - 1] &gt;= times) window.clearInterval(wrap) else { func.apply(this,args) args[args.length - 1]++ } } window.setInterval(wrap,duration) } repeatedTimeout(abcd,10,1000) </code></pre> <p>Which would call it 10 times every 1000 milliseconds, whithout freezing the Browers</p> <p>Heres the <a href="http://jsbin.com/iyaser/1/edit" rel="nofollow">JSBin</a></p> <h2>Update</h2> <p>If it really has to be a for loop, you could do something like this, regardless of the sense it makes to me </p> <pre><code>for (var i = 0; i &lt;= 10 ; i++) { window.setTimeout( (function (i){ return function() { document.write(i + "&lt;br&gt;") } })(i),i * 1000) } </code></pre> <p>In this case heres another <a href="http://jsbin.com/okusez/1/edit" rel="nofollow">JSBin</a></p> <p>This would call <code>window.setTimeout</code> in a <code>for</code> loop and a multiple of the timeout with <code>i</code> as the timeout, this would work, but i'd rather suggest using <code>setInterval</code> like you already did in the Fiddle you posted in the comment</p>
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    1. POAdd a pause/interval to every iteration in a FOR LOOP
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    1. USMoritz Roessler
    1. USMoritz Roessler
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    1. POAdd a pause/interval to every iteration in a FOR LOOP
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    1. COLooping in a `while(...)` will peg the CPU while the condition is true.
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    2. COThx =), I know, i added it because he asked for something like a sleep function, I were editing the answer to point that out and add more stuff, but this took me a while
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    3. COThanks for the answer and your efforts. I made it work using this "[CODE](http://jsfiddle.net/cynNy/1/)" What I am really interested is in doing this using for loop. Using "Sleep" isn't necessary for me.
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