获取URL的GET参数

/**URL的GET参数*/
function getUrlParams(name) {
	var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
	var r = window.location.search.substr(1).match(reg);
	if (r != null && r.length > 0) {
		return decodeURIComponent(r[2]);
	}
	return null;
}