function FocusClear(obj)
{
  obj.value = "";
  obj.style.color = "black";
}

function showHide(nr)
{
    if (document.getElementById(nr))
    {
        type = (document.getElementById(nr).style.visibility == 'hidden') ? 'visible' : 'hidden';
        document.getElementById(nr).style.visibility = type;
            
        type = (document.getElementById(nr).style.display == 'none') ? 'block' : 'none';
        document.getElementById(nr).style.display = type;            
    }        
    
    else if (document.layers && document.layers[nr])
    {
        type = (document.layers[nr].visibility == 'hide') ? 'show' : 'hide'
        document.layers[nr].visibility = type;
        
        type = (document.layers[nr].display == 'none') ? 'block' : 'none';
        document.layers[nr].display = type;
    }
    else if (document.all && document.all[nr])
    {
        type = (document.all[nr].style.visibility == 'hidden') ? 'visible' : 'hidden';
        document.all[nr].style.visibility = type;
        
        type = (document.all[nr].style.display == 'none') ? 'block' : 'none';
        document.all[nr].style.display = type;
    }             
}