js判断来源的url是否是本站点过来的url

<span style="white-space:pre">		</span>var referrerUrl=document.referrer;
		var localUrl = window.location.href.toString();
		var localHostname=window.location.hostname;
		var localPort = window.location.port;
		var localProtocol=window.location.protocol;
		var domain= localProtocol+"//"+localHostname+":"+localPort;
		if(referrerUrl !='' && referrerUrl.indexOf(domain)==0 ){
			//来自于本网站url
		}else{
			//来自其他网站url
			appObj.removeClass("slideUpApp").addClass("slideDownApp");
		}