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POJavascript countdown timer that stops when window is not in focus
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12536627
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2012-09-21T18:59:56.783
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2012-09-21T19:22:55.237
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2012-09-21T19:07:39.247
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Body
<p>Ok , I'm having trouble to solve this , I'm a php / C# web developer , and have no experience or knowledge in Javascript, I have to do just this one thing that needs Javascript:</p> <p>When a certain page loads, a counter starts. The client must stay on this page for 20 seconds. after, I want to execute php code.</p> <p>So there are 2 issues concerning me, first: how do I stop the counter, if client leaves the page (meaning the page is not in focus).</p> <p>2) How can I execute php in javascript? , or call a php function from Javascript.</p> <p>The code I have so far is this:</p> <pre><code><html> <head> </head> <body> <div id='timer'> <script type="text/javascript"> COUNTER_START = 20 function tick () { if (document.getElementById ('counter').firstChild.data > 0) { document.getElementById ('counter').firstChild.data = document.getElementById ('counter').firstChild.data - 1 setTimeout ('tick()', 1000) } else { document.getElementById ('counter').firstChild.data = 'done' } } if (document.getElementById) onload = function () { var t = document.createTextNode (COUNTER_START) var p = document.createElement ('P') p.appendChild (t) p.setAttribute ('id', 'counter') var body = document.getElementsByTagName ('BODY')[0] var firstChild = body.getElementsByTagName ('*')[0] body.insertBefore (p, firstChild) tick() } </script> </div> </body> </html> </code></pre> <p>and I also want the timer to start ticking when the client gets back on page</p> <p>Thank you very much for ur help in advance</p>
Tags
<php><javascript><countdown>
Title
Javascript countdown timer that stops when window is not in focus
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