function ShowBox(id)
{
    var box = document.getElementById(id);
    box.style.visibility = 'visible';
}
function HideBox(id)
{
    var box = document.getElementById(id);
    box.style.visibility = 'hidden';
}
function SetDisplayBlock(id)
{
    var box = document.getElementById(id);
    box.style.display = 'block';
}
function SetDisplayNone(id)
{
    var box = document.getElementById(id);
    box.style.display = 'none';
}
function InsertMsgLink(v,q,p1,x,p2,p3) 
{  
    var e;
    e = p1 + '@' + p2 + '.' + p3;
    if (v == '') {
        v = e;
    }
    document.write('<a href=\"mailto:' + e + q + '\">' + v + '</a>');
}
function ValidateRequiredField(field,alerttxt)
{
    with (field)
    {
        if (value==null||value=="")
            {alert(alerttxt);return false}
        else
            {return true}
    }
}