// modified version of
// outline.js (https://github.com/lindsayevans/outline.js)
// based on http://www.paciellogroup.com/blog/2012/04/how-to-remove-css-outlines-in-an-accessible-manner/
var tcOutline;
(function(d){
  tcOutline = function() {
	var style_element = d.createElement('STYLE'),
	    dom_events = 'addEventListener' in d,
	    add_event_listener = function(type, callback){
			// Basic cross-browser event handling
			if(dom_events){
				d.addEventListener(type, callback);
			}else{
				d.attachEvent('on' + type, callback);
			}
		},
	    set_css = function(css_text){
			// Handle setting of <style> element contents in IE8
			if ( !!style_element.styleSheet )
                style_element.styleSheet.cssText = css_text; 
            else 
                style_element.innerHTML = css_text;
		}
	;

	d.getElementsByTagName('HEAD')[0].appendChild(style_element);

	// Using mousedown instead of mouseover, so that previously focused elements don't lose focus ring on mouse move
	add_event_listener('mousedown', function(){
		set_css('input[type=file]:focus,input[type=radio]:focus,input[type=checkbox]:focus,select:focus,a:focus{outline:0}input[type=file]::-moz-focus-inner,input[type=radio]::-moz-focus-inner,input[type=checkbox]::-moz-focus-inner,select::-moz-focus-inner,a::-moz-focus-inner{border:0;}');
	});

	add_event_listener('keydown', function(){
		set_css('');
	});
  }
})(document);