function doClick(o,a){
		//alert(o.className);
	if(o.className=="nav_long" || o.className=="nav_onlong")
	{
		o.className="nav_onlong";	
	}
	else
	{
		 o.className="nav_current";
	}
	//alert(o.className);
	 var j;
	 var id;
	 var e;
	
	 for(var i=1;i<=8;i++){
	   id ="nav"+i;
	   j = document.getElementById(id);
	   e = document.getElementById("sub"+i);
	   if(id != o.id){
		if(2==i||4==i)
		{
			//alert(a);
			j.className="nav_long";
		}
		else
		{
			j.className="nav_link";
		}
		e.style.display = "none";
	   }else{
			e.style.display = "block";
	   }
	 }
}