$(document).ready(function(){
	$('#categoryId').change(function() {
		var url = String(window.location);
		url = url.replace(/\/$/,'');
		var brokenUrl = url.split('/');
		var cat = undefined;
		var regex = new RegExp('^([0-9]+)$', 'g'); 
		for(var i = 0; i < brokenUrl.length; i++) {
			if((regex.test(brokenUrl[i]) == true) && (brokenUrl[i - 1] == 'category')) cat = i;
		}
		if(cat != undefined) {
			if((brokenUrl[cat - 1] == 'own')) brokenUrl[cat] = 'category/' + $(this).val()
			else brokenUrl[cat] = $(this).val();
		}
		else {
			if((brokenUrl[brokenUrl.length - 1] == 'own')) brokenUrl.push('category');
			brokenUrl.push($(this).val());
		}
		var newUrl = brokenUrl.join('/');
		window.location = newUrl + '/';
	});
});