var csshoverReg = /(^|\s)(([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover|active)/i,
currentSheet, doc = window.document, hoverEvents = [], activators = {
	onhover:{on:'onmouseover', off:'onmouseout'},
	onactive:{on:'onmousedown', off:'onmouseup'}
}

function parseStylesheet(sheet) {
	if(sheet.imports) {
		try {
			var imports = sheet.imports, l = imports.length;
			for(var i=0; i<l; i++) parseStylesheet(sheet.imports[i]);
		} catch(securityException){}
	}

	try {
		var rules = (currentSheet = sheet).rules, l = rules.length;
		for(var j=0; j<l; j++) parseCSSRule(rules[j]);
	} catch(securityException){}
}

function parseCSSRule(rule) {
	var select = rule.selectorText, style = rule.style.cssText;
	if(!csshoverReg.test(select) || !style) return;

	var pseudo = select.replace(/[^:]+:([a-z-]+).*/i, 'on$1');
	var newSelect = select.replace(/(\.([a-z0-9_-]+):[a-z]+)|(:[a-z]+)/gi, '.$2' + pseudo);
	var className = (/\.([a-z0-9_-]*on(hover|active))/i).exec(newSelect)[1];
	var affected = select.replace(/:(hover|active).*$/, '');
	var elements = getElementsBySelect(affected);
	if(elements.length == 0) return;

	currentSheet.addRule(newSelect, style);
	for(var i=0; i<elements.length; i++)
		new HoverElement(elements[i], className, activators[pseudo]);
}

function HoverElement(node, className, events) {
	if(!node.hovers) node.hovers = {};
	if(node.hovers[className]) return;
	node.hovers[className] = true;
	hookHoverEvent(node, events.on, function() { node.className += ' ' + className; });
	hookHoverEvent(node, events.off, function() { node.className = node.className.replace(new RegExp('\\s+'+className, 'g'),''); });
}
	function hookHoverEvent(node, type, handler) {
		node.attachEvent(type, handler);
		hoverEvents[hoverEvents.length] = { 
			node:node, type:type, handler:handler 
		};
	}

	function unhookHoverEvents() {
		for(var e,i=0; i<hoverEvents.length; i++) {
			e = hoverEvents[i]; 
			e.node.detachEvent(e.type, e.handler);
		}
	}

function getElementsBySelect(rule) {
	var parts, nodes = [doc];
	parts = rule.split(' ');
	for(var i=0; i<parts.length; i++) {
		nodes = getSelectedNodes(parts[i], nodes);
	}	return nodes;
}

function getSelectedNodes(select, elements) {
	var result, node, nodes = [];
	var identify = (/\#([a-z0-9_-]+)/i).exec(select);
	if(identify) {
		var element = doc.getElementById(identify[1]);
		return element? [element]:nodes;
	}
		
	var classname = (/\.([a-z0-9_-]+)/i).exec(select);
	var tagName = select.replace(/(\.|\#|\:)[a-z0-9_-]+/i, '');
	var classReg = classname? new RegExp('\\b' + classname[1] + '\\b'):false;
	for(var i=0; i<elements.length; i++) {
		result = tagName? elements[i].all.tags(tagName):elements[i].all; 
		for(var j=0; j<result.length; j++) {
			node = result[j];
			if(classReg && !classReg.test(node.className)) continue;
			nodes[nodes.length] = node;
		}
	}	
		
	return nodes;
}

function ActivateHoverBlockActionInIE() {
	/* применение стиля block:hover через DHTML для IE */
	if(!/MSIE (5|6)/.test(navigator.userAgent)) return;
	window.attachEvent('onunload', unhookHoverEvents);
	var sheets = doc.styleSheets, l = sheets.length;
	for(var i=0; i<l; i++) 
		parseStylesheet(sheets[i]);
}

function AppendTargetAttributeInLinks() {
	/* обработка ссылок с параметром rel="ext:имя_окна" */
	/* для обеспечения xhtml совместимости */

	if (document.getElementsByTagName) {
		links_list = document.getElementsByTagName('a');
		for(i=0; i<links_list.length; i++) {
			if (0 == links_list[i].rel.indexOf('ext:')) {
				links_list[i].target = links_list[i].rel.substring(4, links_list[i].rel.length);
			}
		}
	}
}

/*
    Смена стиля для каждой 2-й строки таблицы
*/

function tableColorCrossing() {
	var contentContainer = document.getElementById('content');
	if (document.getElementsByTagName && contentContainer) {
		var tablesHtml = contentContainer.getElementsByTagName('table');
		for (table in tablesHtml) {
			var table_item = tablesHtml[table];
			for (first_child in table_item.childNodes) {
				if ("TBODY" == table_item.childNodes[first_child].tagName) {
					var tsection = table_item.childNodes[first_child];
					for (trow in tsection.childNodes) {
						if ("TR" == tsection.childNodes[trow].tagName) {
							if (IE || !navigator.userAgent.indexOf('Opera')) {
								if (0 == trow % 2) tsection.childNodes[trow].className = "even";
							} else {
								if (0 == trow % 4) tsection.childNodes[trow].className = "even";
							}
						}
					}
				}      
			}   
		}
	}
}

/*
    Скрипт вывода e-mail
*/
var mail_link;

icomail_name = 'npceridan';
icomail_domain = '@yandex.ru';
icomail_link_s = '<a class="email" href="mailto:' + icomail_name + icomail_domain + '">';
icomail_link_e = '</a>';
mail_link = icomail_link_s + icomail_name + icomail_domain + icomail_link_e;
mail_span_link = icomail_link_s + "<span>" + icomail_name + icomail_domain +"<\/span>" + icomail_link_e;