/**
 * Browser detection.
 */
var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || null;
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| null;
		this.OS = this.searchString(this.dataOS) || null;
	},
	searchString: function (data) {
		for (var i = 0; i < data.length; i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index + this.versionSearchString.length + 1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();

/**
 * Get one or more nodes based on string id.
 */
function $$(element) {
	if (arguments.length > 1) {
		for (var i = 0, elements = [], length = arguments.length; i < length; i++)
			elements.push($$(arguments[i]));
		return elements;
	}
	if (typeof element == 'string')
		element = document.getElementById(element);
	return element;
}

/**
 * Convert a collection into an array.
 */
function $A(iterable) {
	if (!iterable) return [];
	if (iterable.toArray) return iterable.toArray();
	else {
		var results = [];
		for (var i = 0, length = iterable.length; i < length; i++)
			results.push(iterable[i]);
		return results;
	}
}

/**
 * Get the value of a form element.
 */
function $F(element) {
	element = $$(element);
	switch (element.tagName.toLowerCase()) {
		case 'input':
			switch (element.type.toLowerCase()) {
				case 'checkbox':
				case 'radio':
					return element.checked ? element.value : null;
				default:
					return element.value;
			}
		case 'textarea':
			return element.value;
		case 'select':
			if (element.multiple) {
				for (var i = 0, values = [], length = element.options.length; i < length; i++) {
					var opt = element.options[i];
					if (opt.selected) values.push(opt.value);
				}
				return values;
			} else {
				return element.options[element.selectedIndex].value;
			}
		default:
			return null;
	}
}

/**
 * Get the words in a string as an array.
 */
function $w(string) {
	return string ? string.replace(/^\s+|\s+$/g, '').split(/\s+/) : [];
}

/**
 * Get all elements with the given class name(s).
 */
function getElementsByClassName(classNames, tag, element){
	var testClass = new RegExp('\\b' + $w(classNames.replace(/\-/, '\\-')).join('\\b|\\b') + '\\b');
	tag = tag || '*'; element = element || document;
	var elements = (tag == '*' && element.all) ? element.all : element.getElementsByTagName(tag);
	var returnElements = [];
	for (var i = 0; i < elements.length; i++){
		if(testClass.test(elements[i].className)){
			returnElements.push(elements[i]);
		}
	}
	return returnElements;
}

function noSubmit(event) {
	if ((event.keyCode || event.charCode) == 13) {
		return false;
	} else {
		return true;
	}
}

/**
 * Redraw the visual area.
 */
document.redraw = function () {
	document.body.style.position = 'relative';
	setTimeout(function () { document.body.style.position = ''; }, 0);
}