JavaScript: Get array of url params (jQuery)

main.js

$.urlParam = function(name, url){
	var url = url || window.location.href;

	var reg = new RegExp('[\?&]' + name + '=([^&#]*)', 'g');
	var results, returnResult = new Array(), i = 0;
	while(results = reg.exec(url)) {
		returnResult[i] = results;
		i++;
	}

	if (returnResult==null){
		return null;
	}
	else{
		return returnResult || 0;
	}
}