function updateOrientation(){  
    var contentType = "width:320px;";  
    switch(window.orientation){  
        case 0:  
        contentType = "width:320px";  
        break;  

        case -90:  
        contentType = "width:480px";  
        break;  

        case 90:  
        contentType = "width:480px";  
        break;  

        case 180:  
        contentType = "width:320px";  
        break;  
    }  

    document.getElementById("container").setAttribute("style", contentType);  
    
    window.scrollTo(0,1);
}