Chris@76: // This file contains javascript associated with the captcha visual verification stuffs.
Chris@76: 
Chris@76: function smfCaptcha(imageURL, uniqueID, useLibrary, letterCount)
Chris@76: {
Chris@76: 	// By default the letter count is five.
Chris@76: 	if (!letterCount)
Chris@76: 		letterCount = 5;
Chris@76: 
Chris@76: 	uniqueID = uniqueID ? '_' + uniqueID : '';
Chris@76: 	autoCreate();
Chris@76: 
Chris@76: 	// Automatically get the captcha event handlers in place and the like.
Chris@76: 	function autoCreate()
Chris@76: 	{
Chris@76: 		// Is there anything to cycle images with - if so attach the refresh image function?
Chris@76: 		var cycleHandle = document.getElementById('visual_verification' + uniqueID + '_refresh');
Chris@76: 		if (cycleHandle)
Chris@76: 		{
Chris@76: 			createEventListener(cycleHandle);
Chris@76: 			cycleHandle.addEventListener('click', refreshImages, false);
Chris@76: 		}
Chris@76: 
Chris@76: 		// Maybe a voice is here to spread light?
Chris@76: 		var soundHandle = document.getElementById('visual_verification' + uniqueID + '_sound');
Chris@76: 		if (soundHandle)
Chris@76: 		{
Chris@76: 			createEventListener(soundHandle);
Chris@76: 			soundHandle.addEventListener('click', playSound, false);
Chris@76: 		}
Chris@76: 	}
Chris@76: 
Chris@76: 	// Change the images.
Chris@76: 	function refreshImages()
Chris@76: 	{
Chris@76: 		// Make sure we are using a new rand code.
Chris@76: 		var new_url = new String(imageURL);
Chris@76: 		new_url = new_url.substr(0, new_url.indexOf("rand=") + 5);
Chris@76: 
Chris@76: 		// Quick and dirty way of converting decimal to hex
Chris@76: 		var hexstr = "0123456789abcdef";
Chris@76: 		for(var i=0; i < 32; i++)
Chris@76: 			new_url = new_url + hexstr.substr(Math.floor(Math.random() * 16), 1);
Chris@76: 
Chris@76: 		if (useLibrary && document.getElementById("verification_image" + uniqueID))
Chris@76: 		{
Chris@76: 			document.getElementById("verification_image" + uniqueID).src = new_url;
Chris@76: 		}
Chris@76: 		else if (document.getElementById("verification_image" + uniqueID))
Chris@76: 		{
Chris@76: 			for (i = 1; i <= letterCount; i++)
Chris@76: 				if (document.getElementById("verification_image" + uniqueID + "_" + i))
Chris@76: 					document.getElementById("verification_image" + uniqueID + "_" + i).src = new_url + ";letter=" + i;
Chris@76: 		}
Chris@76: 
Chris@76: 		return false;
Chris@76: 	}
Chris@76: 
Chris@76: 	// Request a sound... play it Mr Soundman...
Chris@76: 	function playSound(ev)
Chris@76: 	{
Chris@76: 		if (!ev)
Chris@76: 			ev = window.event;
Chris@76: 
Chris@76: 		popupFailed = reqWin(imageURL + ";sound", 400, 120);
Chris@76: 		// Don't follow the link if the popup worked, which it would have done!
Chris@76: 		if (!popupFailed)
Chris@76: 		{
Chris@76: 			if (is_ie && ev.cancelBubble)
Chris@76: 				ev.cancelBubble = true;
Chris@76: 			else if (ev.stopPropagation)
Chris@76: 			{
Chris@76: 				ev.stopPropagation();
Chris@76: 				ev.preventDefault();
Chris@76: 			}
Chris@76: 		}
Chris@76: 
Chris@76: 		return popupFailed;
Chris@76: 	}
Chris@76: }