function addEvent(obj, evType, fn) {
	if (obj.addEventListener) {
		obj.addEventListener(evType, fn, true);
		return true;
	} else if (obj.attachEvent){
		var r = obj.attachEvent("on"+evType, fn);
		return r;
	} else {
		return false;
	}
}
function externalLinks() {
	if (!document.getElementsByTagName) { return; }
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++) {
		var anchor = anchors[i];
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external") anchor.target = "_blank";
	}
}
initMainNav = function() {
	if (document.all&&document.getElementById) {
		navRoot = document.getElementById("header_nav_site");
		for (i=0; i<navRoot.childNodes.length; i++) {
			node = navRoot.childNodes[i];
			if (node.nodeName=="LI") {
				node.onmouseover=function() {
					this.className+="over";
  				}
  				node.onmouseout=function() {
  					this.className=this.className.replace("over", "");
   				}
   			}
  		}
 	}
}
function QueryString(key) {
	var value = null;
	for (var i=0;i<QueryString.keys.length;i++) {
		if (QueryString.keys[i]==key) {
			value = QueryString.values[i];
			break;
		}
	}
	return value;
}

function QueryStringSet(key, val) {
	var value = null;
	for (var i=0;i<QueryString.keys.length;i++) {
		if (QueryString.keys[i]==key) {
			QueryString.values[i] = val;
			break;
		}
	}
}

QueryString.keys = new Array();
QueryString.values = new Array();

function QueryString_Parse() {
	var query = window.location.search.substring(1);
	var pairs = query.split("&");
	
	for (var i=0;i<pairs.length;i++) {
		var pos = pairs[i].indexOf('=');
		if (pos >= 0) {
			var argname = pairs[i].substring(0,pos);
			var value = pairs[i].substring(pos+1);
			QueryString.keys[QueryString.keys.length] = argname;
			QueryString.values[QueryString.values.length] = value;		
		}
	}
}
QueryString_Parse();

function showTabOnLoad(){
	showtab.expandit('thistab'+tab);
}


addEvent(window, 'load', externalLinks);
addEvent(window, 'load', initMainNav);