title: how to force chrome not to reload images with same url till the page is refreshed ,like firefox
body: <p>Firefox doesnt reload images with the same url till refresh.</p>
  
  <pre><code>$("#a").click(function(){$("#img").attr("src","img.php?id=3");});
  &lt;img id="img" src="img.php?id=3"&gt;
  
  //the two line above are in the same html page.And when the html page is loaded
  // in the browser, i open a new tab and go to the php page that includes 
  //the line below.
  
  mysql_query("update images set data=$data where id=3");//changing the image here
  </code></pre>
  
  <p>then i go back to the html page and click #a, in firefox the old image is shown so it doesnt ask mysql if the image with id=2 is changed or not unless the html page is refreshed.But in chrome the new,changed image is shown.it goes and asks mysql again ,doesn't care if the url is still same.</p>
  
  <p>i want chrome to behave like firefox.Tried to set expire,last modified etc. headers for no caching but it worked in a different way.as far as i sensed it is not caching what im looking for.Anyways, this is a really important issue for me i would appreciate any help.</p>