79 lines
2.2 KiB
JavaScript
79 lines
2.2 KiB
JavaScript
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// This file contains javascript associated with the captcha visual verification stuffs.
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function smfCaptcha(imageURL, uniqueID, useLibrary, letterCount)
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{
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// By default the letter count is five.
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if (!letterCount)
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letterCount = 5;
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uniqueID = uniqueID ? '_' + uniqueID : '';
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autoCreate();
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// Automatically get the captcha event handlers in place and the like.
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function autoCreate()
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{
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// Is there anything to cycle images with - if so attach the refresh image function?
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var cycleHandle = document.getElementById('visual_verification' + uniqueID + '_refresh');
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if (cycleHandle)
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{
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createEventListener(cycleHandle);
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cycleHandle.addEventListener('click', refreshImages, false);
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}
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// Maybe a voice is here to spread light?
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var soundHandle = document.getElementById('visual_verification' + uniqueID + '_sound');
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if (soundHandle)
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{
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createEventListener(soundHandle);
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soundHandle.addEventListener('click', playSound, false);
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}
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}
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// Change the images.
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function refreshImages()
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{
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// Make sure we are using a new rand code.
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var new_url = new String(imageURL);
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new_url = new_url.substr(0, new_url.indexOf("rand=") + 5);
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// Quick and dirty way of converting decimal to hex
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var hexstr = "0123456789abcdef";
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for(var i=0; i < 32; i++)
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new_url = new_url + hexstr.substr(Math.floor(Math.random() * 16), 1);
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if (useLibrary && document.getElementById("verification_image" + uniqueID))
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{
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document.getElementById("verification_image" + uniqueID).src = new_url;
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}
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else if (document.getElementById("verification_image" + uniqueID))
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{
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for (i = 1; i <= letterCount; i++)
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if (document.getElementById("verification_image" + uniqueID + "_" + i))
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document.getElementById("verification_image" + uniqueID + "_" + i).src = new_url + ";letter=" + i;
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}
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return false;
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}
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// Request a sound... play it Mr Soundman...
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function playSound(ev)
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{
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if (!ev)
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ev = window.event;
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popupFailed = reqWin(imageURL + ";sound", 400, 120);
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// Don't follow the link if the popup worked, which it would have done!
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if (!popupFailed)
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{
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if (is_ie && ev.cancelBubble)
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ev.cancelBubble = true;
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else if (ev.stopPropagation)
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{
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ev.stopPropagation();
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ev.preventDefault();
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}
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}
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return popupFailed;
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}
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}
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