var myNav = document.getElementById("nav").getElementsByTagName("a"); 
				for(var i=0;i<myNav.length;i++) { 
					var links = myNav[i].getAttribute("href");
					var myURL = document.location.href; 
					if(myURL=="http://www.huiwen.org/"){
						myNav[0].className="first";}

					
					if(myURL.indexOf(links) != -1) { 
						myNav[i].className="first"; 
					}
					

				}