JS获得URL超链接的参数值

		var url = location.href; 
		//获取keyword的参数值
		var es=/keyword=/;
		es.exec(url);
		var result=RegExp.rightContext;
		

		var url = location.href; 
		//获取pid的参数值
		var es=/pid=/;
		es.exec(url);
		var pid=RegExp.rightContext;
		
		var aurl = "&pid="+pid;