rUrl=self.location.href.substring(self.location.href.indexOf('?')+1);
        rUrl ="https://service.zcmu.edu.cn";
		rAddr = "45.34.195.226";
		if (rAddr.substring(0,7) == "192.168")  {
		    document.write("<a href='"+ rUrl +"' target='_blank' style='width:100px;'>学生门户</a>");
		}
		else if(rAddr.substring(0,3) == "172"){
		    document.write("<a href='"+ rUrl +"' target='_blank' style='width:100px;'>学生门户</a>");
		}
		else if(rAddr.substring(0,3) == "10."){
		    document.write("<a href='"+ rUrl +"' target='_blank' style='width:100px;'>学生门户</a>");
		}
		else{
		      document.write("<a href='http://vpn.zcmu.edu.cn' target='_blank'>学生门户</a>");
		}

 // https://portal.zcmu.edu.cn/zfca/login?service=http%3A%2F%2Fportal.zcmu.edu.cn%2Fportal.do