StackOverflow2013

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Id
15585020
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2013-03-23T09:01:55.970
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2013-03-23T09:01:55.970
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text
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<p>Sure!</p> <p>Client side:</p> <pre><code><script type="text/javascript"> //The first image to load CurrentImage="http://images.google.com/intl/en_ALL/images/logos/images_logo_lg.gif"; //The Image, eg: <img id=imgBox src=foo.jpg> ImgBox = document.getElementById('imgBox'); function CheckForImg() { var ajaxRequest; // The variable that makes Ajax possible! try{ // Opera 8.0+, Firefox, Safari ajaxRequest = new XMLHttpRequest(); } catch (e){ try { ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try{ ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e){ // Something went wrong alert("Ajax is kinda disabled :(\n you won't be able to do some stuff around :("); return false; } } } // Create a function that will receive data sent from the server ajaxRequest.onreadystatechange = function(){ if(ajaxRequest.readyState == 4){ var str = ajaxRequest.responseText; if(str != CurrentImage) // we have a new image { ImgBox.src = str; currentImage = str; } } ajaxRequest.open("GET", "getCurrentImagUrl.php", true); ajaxRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded") ajaxRequest.send(null); } </script> </code></pre> <p>Now we need a way to keep the client posted, so either we put that to a frequency, or show a button to press which is way better and more efficient:</p> <p>Method 1(Button):</p> <pre><code><Button onclick="CheckForImg();">Check For Image!</button> </code></pre> <p>Method 2(Periodically check):</p> <p>Simply call </p> <pre><code>SetInterval("CheckForImg", 5000); </code></pre> <p>I'll leave the server side for you :)</p> <p>Any further help is kindly offered.</p>
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1. POchange images in clients browser on my demand
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  PTQuestion
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1. PTAnswer
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1. USOmar Alshaker
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