jQuery.query = function(s){
	var r = {};
	if(s){
		var q = s.substring(s.indexOf('?') + 1); // remove everything up to the ?
		q = q.replace(/\&$/, ''); // remove the trailing &
		jQuery.each(q.split('&'), function() {
			var splitted = this.split('=');
			var key = splitted[0];
			var val = splitted[1];
			// convert numbers
			if(/^[0-9.]+$/.test(val)) val = parseFloat(val);
			// convert booleans
			if(val == 'true') val = true;
			if(val == 'false') val = false;
			// ignore empty values
			if(typeof val == 'number' || typeof val == 'boolean' || (val && val.length > 0)) r[key] = val;
		});
	}
	return r;
};

function getQueryStringValueByName(name){
	var value = null;
	var queryString = $.query(location.search);
	$.each(queryString,function(i,n){
		if(i == name){
			value = n;
		}
	});
	return(value);
}