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 Refresh CAPTCHA image without reloading page

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scarvello

Posts: 62
Posted: 11/23/2015, 2:07 PM

Just recopy 3 functions that are into js/jquery/captcha/ccs-captcha.js into the HEAD section of your HTML page.
These funcitons are:
function qPath(x1, y1, x2, y2, x3, y3)
function qPaths() 
function drawCaptcha(canvas, url, bColor, fColor) 
Then add another function like this:
function reload(){  
  // Get Canvas object from your HTML page  
  var canv = document.getElementById('inc_iscrizionesoggettoCaptcha1Picture');  
    
  // First of all clear it's contex  
  var context = canv.getContext('2d');  
  context.clearRect(0, 0, canv.width, canv.height);   
    
  // Set the ajax url that generate codes (note it's the same php page   
  // that generate HTML page with a callbackControl parameter equal to the   
  // id name of CAPTHA control  
  var url = "iscrizione.php?callbackControl=inc_iscrizionesoggettoCaptcha1";  
    
  // Call JS Function  
  drawCaptcha(canv, url, "255;159;113;0", "51;51;51");  
}

Thats it.

Now into HTML page simply add a control like this to call the reload() function :

  
<button onclick="reload()" type="button" class="btn btn-primary">  
      <span class="glyphicon glyphicon-refresh"></span>  
</button>  
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