// ***** IMAGES/ICONS ***** //
 
var EnabledImg = "data:image/png;base64,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";
 
var DisabledImg = "data:image/png;base64,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";
 
 
 
 
// ***** VARS ***** //
 
var button = this;
var URLs = [];
 
 
 
 
// ***** FUNCTIONS ***** //
 
function getURLs() {
//This function is adapted from the one used by the Uppity extension by Anthony Lieuallen: https://addons.mozilla.org/en-US/firefox/addon/869
        var loc = gBrowser.contentDocument.location;
        URLs = [];
	try {
		//check for validity
		if ('about:'==loc.protocol) return;
 
		//get the URL
		var path=loc.href;
		//strip off the scheme and host
		path=path.replace(/^.*:\/\/[^\/]*\//, '');
		//and the trailing slash if there
		path=path.replace(/\/$/, '');
		//and any extra leading slashes
		path=path.replace(/^\/+/, '');
 
		var host=loc.host;
		var scheme=loc.protocol+'//';
		var emptyPath=(''==path);
 
		//strip hash if there
		if (path.indexOf('#')>0) {
			path=path.replace(/#.*/, '');
			URLs[URLs.length]=scheme+host+'/'+path;
		}
 
		//strip querystring if there
		if (path.indexOf('?')>0) {
			path=path.replace(/\?.*/, '');
			URLs[URLs.length]=scheme+host+'/'+path;
		}
 
		//strip files/directories if there
		while (path.indexOf('/')>0) {
			path=path.replace(/\/[^\/]*$/, '');
			URLs[URLs.length]=scheme+host+'/'+path+'/';
		}
 
		//host only
		if (!emptyPath) URLs[URLs.length]=scheme+host+'/';
		//strip subdomains if there
		if (!host.match(/^([0-9]+\.)+$/)) { // if it's not a numeric IP
			var hostSuffix='';
			// strip port
			var x=host.lastIndexOf(':');
 
			if (x>0) {
				hostSuffix=host.substr(x);
				host=host.substr(0, x);
			}
 
			// strip TLD
			hostSuffix=host.substr(host.length-6)+hostSuffix;
			host=host.substr(0, host.length-6);
 
			while (-1!=host.indexOf('.')) {
				host=host.replace(/[^.]*\./, '');
				URLs[URLs.length]=scheme+host+hostSuffix+'/';
			}
		}
	} catch (e) { }
}
 
function Reload()
{
    getURLs();
 
    if (URLs.length > 0) {
        button.tooltipText = 'Go up to: \n '+URLs[0];
        button.image = EnabledImg;
    }
    else {
        button.tooltipText = 'Nowhere to go up to';
        button.image = DisabledImg;
    }
}
 
 
 
 
// ***** MOUSE/EVENT HANDLING ***** //
 
this.leftclick = function(evt) 
{
  getURLs();
  if (URLs.length > 0) {
    loadURI(URLs[0]);
  }
}
 
function Closed(event)
{
  // Remove event listener
  window.removeEventListener("focus", Reload, true);
}
 
 
 
// ***** INITIALISATION ***** //
 
this.setAttribute('onclick', 'gQuot(event, this)'); // Calls the Global MouseClick handler gQuot
this.setAttribute('ondblclick', 'gQuot(event, this)');
 
window.addEventListener("focus", Reload, true);
window.onclose = Closed;
 
 
 
 
// ***** ATTRIBUTES ***** //
 
this.setAttribute('author','Rawny');
this.setAttribute('version','1.3');
this.setAttribute('homepage', 'http://custombuttons2.com/forum/buttons/buttons-database/go-buttons.html');
this.setAttribute('dependency','FF2.0*, FL1.0*, TB2.0*, CB2 2.0.5*');
this.setAttribute('status','Complete')
this.setAttribute('public',true);