function ZmienStyl()
{
	var link = null;
	var css = '';
	
	this.get = function(){
		return css;
	}
	
	this.set = function(url){
		css = url;
		this.show();
	}
	
	this.show = function(){
		var url = this.get();
		if (url != ''){
			if (link == null){
					if (document.getElementsByTagName('link')[0].getAttribute('rel').toLowerCase() == 'stylesheet'){
						link = document.getElementsByTagName('link')[0];
					}
			}
			link.setAttribute('href', url);
		}
	}
	
	this.show();
}
var zmien = new ZmienStyl();