//导航切换
function jeeNav(o,n){
    	 var t;
	 var id;
	 var s;
	 for(var i=1;i<=n;i++){
	   id ="nav"+i;
	   t = document.getElementById(id);
	   s = document.getElementById("sub"+i);
	   if(id != o.id){
	       s.style.display = "none";
	   }
	   else{
	       s.style.display = "block";
	   }
	 }
}

//友情链接
function change(value){ 
      if(value != ""){   
          if( value.indexOf("http://")!= -1 ){
              window.open(value);
          }else{
              window.open("http://"+value);
          }
      }
}