var locktime = 0;
function ToggleImage(element)
{
	var now = new Date();
	if (locktime < now.getTime()-1000)
	{
		switch($(element).alt)
		{
			case 'show':
				$(element).alt = 'hide';
				$(element).src = 'gfx/misc/collapse.gif';
			break;
			default:
				$(element).alt = 'show';
				$(element).src = 'gfx/misc/expand.gif';
			break;
		}
		locktime = now.getTime();
	}
	else return false;
}

function showmatchresult(element) {
	element.getElementsByTagName("img")[0].style.display = 'none';
	element.getElementsByTagName("span")[0].style.display = 'inline';
	element.style.cursor = 'auto';
}

//JSON fallback
var JSON = JSON || {};
JSON.stringify = JSON.stringify || function(obj) {
	var t = typeof (obj);
	if (t != "object" || obj === null) {
		// simple data type
		if (t == "string") obj = '"'+obj+'"';
		return String(obj);
	}
	else {
		// recurse array or object
		var n, v, json = [], arr = (obj && obj.constructor == Array);
		for (n in obj) {
			v = obj[n]; t = typeof(v);

			if (t == "string") v = '"'+v+'"';
			else if (t == "object" && v !== null) v = JSON.stringify(v);

			json.push((arr ? "" : '"' + n + '":') + String(v));
		}
		return (arr ? "[" : "{") + String(json) + (arr ? "]" : "}");
	}
};
JSON.parse = JSON.parse || function(text) {
    var object = !(/[^,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]/.test(text.replace(/"(\\.|[^"\\])*"/g, ''))) && eval('(' + text + ')');
    return object;
}

//upload progress
uploadprogress = null;

function openProgressBar(form) {
    /* generate random progress-id */
    uuid = "";
    for (i = 0; i < 32; i++) {
      uuid += Math.floor(Math.random() * 16).toString(16);
    }
    /* patch the form-action tag to include the progress-id */
    if (typeof form == "string") {
        form = $(form);
    }
    
    //insert hidden input with progress-id
    form.action += "&X-Progress-ID=" + uuid;

    /* call the progress-updater every 1000ms */
    uploadprogress = window.setInterval(function () {  fetchUploadProgress(uuid);  }, 1000);
}

function fetchUploadProgress(uuid) {
    new Ajax.Request('/uprogress', {
        requestHeaders: ['X-Progress-ID', uuid],
        method: 'get',
        onSuccess: function(transport) {
            var upload = transport.responseJSON;
            if (upload.state == 'uploading') {
                var percent = Math.floor(upload.received / upload.size * 100);
                $('progressbar').setStyle({width: percent+'%'});
                $('progresspercent').update(percent+'%');
            } else if (upload.state == 'done') {
                window.clearTimeout(uploadprogress);
                $('progressbar').setStyle({backgroundColor: '#0000FF', width: '100%'});
                $('progresspercent').update('Upload finished');
            } else if (upload.state == 'error') {
                window.clearTimeout(uploadprogress);
                $('progressbar').setStyle({backgroundColor: '#C40000'});
                if (upload.status == 413) {
                    $('progresspercent').update('Upload failed: File is too large');
                } else {
                    $('progresspercent').update('Upload failed: ' + upload.status);
                }
            }
        }
    });
}