function show_hide(id)
 {
var id = document.getElementById(id) ;
var dopid = document.getElementById("dopid") ;
    if (id.style.display == "none")
    {
        id.style.display = "block";
		dopid.style.display = "none";
    }
    else 
    {
        id.style.display = "none";
		dopid.style.display = "block";
    }
}