function urlParser(url)
	{
		if(url != undefined) this.parse(url);
	}

	urlParser.prototype.protocol = window.location.protocol;
	urlParser.prototype.host = window.location.host;
	urlParser.prototype.path = window.location.pathname;
	urlParser.prototype.parameters = {};
	urlParser.prototype.anchor = '';
	
	urlParser.prototype.baseUrl;

	urlParser.prototype.setBaseUrl = function(url)
	{
		this.baseUrl = new urlParser(url);
		this.parse();
		return this;
	}

	urlParser.prototype.resetBaseUrl = function()
	{
		this.baseUrl = undefined;	
	}

	urlParser.prototype.reset = function()
	{
		
		if(this.baseUrl != undefined)
		{
			this.protocol = this.baseUrl.protocol;
			this.host = this.baseUrl.host;
			this.path = this.baseUrl.path;
		}
		else
		{
			this.protocol = window.location.protocol;
			this.host = window.location.host;
			this.path = window.location.pathname;
		}

		this.parameters = {};
		this.anchor = '';
	}
	
	urlParser.prototype.parse = function(ref)
	{
		if(ref == undefined) ref = '';
		
		this.reset();

		var pos;

		if((pos = ref.search(/\:/)) >= 0)
		{
			this.protocol = ref.substring(0, pos + 1);
			ref = ref.substring(pos + 1);
		}

		if((pos = ref.search(/\#/)) >= 0)
		{
			this.anchor = ref.substring(pos + 1);
			ref = ref.substring(0, pos);
		}

		if((pos = ref.search(/\?/)) >= 0)
		{
			var paramsStr = ref.substring(pos + 1) + '&';
			ref = ref.substring(0, pos);
			while((pos = paramsStr.search(/\&/)) >= 0)
			{
				var paramStr = paramsStr.substring(0, pos);
				paramsStr = paramsStr.substring(pos + 1);

				if(paramStr.length)
				{
					var equPos = paramStr.search(/\=/);
					if(equPos < 0) this.parameters[paramStr] = '';
					else this.parameters[paramStr.substring(0, equPos)] = decodeURIComponent(paramStr.substring(equPos + 1));
				}
			}
		}

		if(ref.search(/\/\//) == 0) // absolute
		{
			ref = ref.substring(2);
			if((pos = ref.search(/\//)) >= 0)
			{
				this.host = ref.substring(0, pos);
				this.path = ref.substring(pos);
			}
			else
			{
				this.host = ref;
				this.path = '/';
			}
		}
		else if(ref.search(/\//) == 0) // relative to host
		{
			this.path = ref;
		}
		
		else // relative to directory
		{
			var p = this.path.lastIndexOf('/');
			if(p < 0) this.path = '/';
			else if(p < this.path.length - 1) this.path = this.path.substring(0, p + 1);
			
			while(ref.search(/\.\.\//) == 0)
			{
				var p = this.path.lastIndexOf('/', this.path.lastIndexOf('/') - 1);
				if(p >= 0) this.path = this.path.substring(0, p + 1);
				ref = ref.substring(3); // removing '../' from begining
			}
			this.path = this.path + ref;
		}

		return this;
	}

	urlParser.prototype.assemble = function()
	{
		var ref = this.protocol + '//' + this.host + this.path;
		var div = '?';
		for(var key in this.parameters)
		{
			ref += div + key + '=' + encodeURIComponent(this.parameters[key]);
			div = '&amp;';
		}
		return ref;
	}

	jQuery.urlParser = new urlParser();