function ShowHide(objid)
{ 
    if(objid.style.display == 'block')
        objid.style.display = 'none';
    else
        objid.style.display = 'block';
}

function clear_textbox(objid, oldtext)
{
    if(objid.value == oldtext)
        objid.value = '';
}

function fill_textbox(objid, oldtext)
{
    if(objid.value == '')
        objid.value = oldtext;
}