function navGoing()
{
    var url = window.location+''; 
    if(url.indexOf("index.asp")!=-1)
    { 
        document.getElementById("a1").className="top_2_1_2"; 
    }
    else if(url.indexOf("about.asp")!=-1)
    { 
        document.getElementById("a2").className="top_2_1_2"; 
    }
    else if(url.indexOf("sofa.asp")!=-1)
    { 
        document.getElementById("a3").className="top_2_1_2"; 
    }
    else if(url.indexOf("newproduct.asp")!=-1)
    { 
        document.getElementById("a4").className="top_2_1_2"; 
    }
    else if(url.indexOf("chair.asp")!=-1)
    { 
        document.getElementById("a5").className="top_2_1_2"; 
    }
    else if(url.indexOf("news.asp")!=-1 | url.indexOf("newsshow.asp")!=-1)
    { 
        document.getElementById("a6").className="top_2_1_2"; 
    }
    else if(url.indexOf("order.asp")!=-1)
    { 
        document.getElementById("a7").className="top_2_1_2"; 
    }
    else if(url.indexOf("contact.asp")!=-1)
    { 
        document.getElementById("a8").className="top_2_1_2"; 
    }
    else
    {
        document.getElementById("a1").className="top_2_1_2"; 
    }
}