var offsetTop=173;
var navID="moveMenu";

function mv(){
    if(document.all){
            nowY=document.documentElement.scrollTop;
            }else{
            nowY=self.pageYOffset;
        }
        nowY+=offsetTop;
        if(document.getElementById){
            document.getElementById(navID).style.top=nowY+"px";
            }else if(document.all){
                document.all(navID).style.pixelTop=nowY;
        }
    }

function pageBack(){
	history.back();
	}