function navi(select) { 
    url = select.options[select.selectedIndex].value; 
    if(url != "--") { 
        if(url.substr(0,1) == "@") { 
            var winTarget = "_blank"; 
            url = url.substr(1,url.length-1); 
            open(url, winTarget); 

        } else { 
            self.location.href = url; 
        } 
    } 
}