function showT()  {

document.all.T.style.visibility = 'visible';

}

function hideT()  {

document.all.T.style.visibility = 'hidden';

}

function showV()  {

document.all.V.style.visibility = 'visible';

}


function hideV()  {

document.all.V.style.visibility = 'hidden';

}

function showW()  {

document.all.W.style.visibility = 'visible';

}


function hideW()  {

document.all.W.style.visibility = 'hidden';

}

function showVOIP()  {

document.all.VOIP.style.visibility = 'visible';

}


function hideVOIP()  {

document.all.VOIP.style.visibility = 'hidden';

}

function showdetails()  {

document.all.details.style.visibility = 'visible';

}


function hidedetails()  {

document.all.details.style.visibility = 'hidden';

}