function _(id) {
	return document.getElementById(id);
}


function show_submenu(id) {
	if (_('submenu' + id))
		_('submenu' + id).style.display = 'block';
}

function hide_submenu(id) {
	if (_('submenu' + id))
		_('submenu' + id).style.display = 'none';
}

(function ($) {
$.fn.hAlign = function() {
	return this.each(function(i){
	var w = $(this).width();
	var ow = $(this).outerWidth();	
	var ml = (w + (ow - w)) / 2;	
	$(this).css("margin-left", "-" + ml + "px");
	$(this).css("left", "50%");
	$(this).css("position", "absolute");
	});
};
})(jQuery);


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";
		}
	}
}
window.onload = externalLinks;