var captchaGeneratorUrl;

 	function getCaptcha(url) {
        var httpRequest;
        var random;

        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            httpRequest = new XMLHttpRequest();
            if (httpRequest.overrideMimeType) {
                httpRequest.overrideMimeType('text/xml');
                // See note below about this line
            }
        } 
        else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
            } 
            catch (e) {
                try {
                    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                } 
                catch (e) {}
            }
        }

        if (!httpRequest) return false;

		// IE patch
		random = Math.round(Math.random()*999999 + 1000000);

        httpRequest.onreadystatechange = function() { useCaptcha(httpRequest); };
        httpRequest.open('GET', url+'?'+random, true);
        httpRequest.send('');
    }

    function useCaptcha(httpRequest) {
        if (httpRequest.readyState == 4) {
            if (httpRequest.status == 200) {
            	var hash = httpRequest.responseText; 
                var element;
                element = document.getElementById('captchaimage');
                element.src = 'captcha-'+hash+'.gif';
                element = document.getElementById('captchasound');
                element.href = 'captcha-'+hash+'.wav';
                element = document.getElementById('captchahash');
                element.value = hash;
            }
        }
    }			
			
	function showEmailBlock() {
		var element;
		var element2;
		element = document.getElementById('email-block');
		element.style.display = (element.style.display == 'block') ? 'none' : 'block';
		element2 = document.getElementById('email-activator');
		element2.className = (element.style.display == 'block') ? 'email email-active' : 'email';
	}
	
    function refreshCaptcha()
    {
    		var element;
    		element = document.getElementById('email-block');
    		if (element) {
	    		if (element.style.display == 'block') {
	    			getCaptcha(captchaGeneratorUrl);
	    			setTimeout(function(){refreshCaptcha()}, 60*1000);
	    		} else {
	    			setTimeout(function(){refreshCaptcha()}, 200);
	    		}
    		}
    }